ICD-10 DEMYSTIFIED
by Wyn Staheli - Updated September 2002
For an ICD-10-CM summary go to ICD-10-CM Update.
ICD HISTORY
To fully appreciate where we are headed, it is best to understand a little
bit of history on this subject. In 1948, the World Health Organization (WHO) published the
first International Classification of Diseases (ICD). This coding system was developed by
WHO to provide international consistency for reporting MORTALITY statistics ONLY.
Numbers were added with subsequent revisions to identify the new "version". Thus
the nomenclature became ICD-2, ICD-3 and so forth. ICD-9 and ICD-10, the most current
versions, are copyrighted by the World Health Organization (WHO). ICD-10 is the latest
version. Effective January 1, 1999, ICD-10 officially was implemented in the United States
for reporting the cause of death on death certificates. For more information on ICD-10,
please refer to the WHO website at http://www.who.org
Do NOT panic! Even though ICD-10 was implemented January of 1999, you should not be
using it to submit insurance claims right now or ever. It is human nature to shorten what
we can. This tendency to abbreviate has created a bit of confusion when it comes to ICD.
ICD-9 is NOT the same as ICD-9-CM although they are related. The United
States National Center for Health Statistics (NCHS) and the Center for Disease Control
(CDC) make it very clear that ICD and ICD-CM are two separate though closely related
classification systems. The differences between these two classification systems are
explained in the next section.
CLINICAL MODIFICATION (CM) CREATION
When ICD-9 was published by the WHO in 1977, NCHS made a
decision to modify the ICD-9 to gather more clinical information and capture MORBIDITY
statistics within the US. This modification became known as ICD-9-CM. Thus ICD-9-CM
captures both morbidity and mortality statistics for the US. CM is the
Clinical Modification created by the US.
Changes to the US CM are made annually through a review process to further clarify some
codes and to create new codes needed as a result of discoveries, medical advancements or other
administrative reasons. This review process is under the direction of the Centers for Medicare & Medicaid Services (CMS), formerly Health Care
Finance Administration (HCFA), the American Hospital Association (AHA) and the National
Center for Health Statistics (NCHS).
ICD-9-CM & CLAIMS
When Congress passed the Medicare Catastrophic Coverage Act
(MCCA) in 1988, it required the use of ICD-9-CM codes for processing Medicare claims. That
act was later repealed, but the requirement of ICD-9-CM codes for Medicare claims was
upheld. The ball was set in motion. Much of the insurance industry followed Medicare's
lead. Therefore, ICD-9-CM is currently required by third party payors for reporting the
clinical diagnosis associated with the procedure(s) performed.
ICD-9-CM TODAY
ICD-9-CM is currently divided into 3 volumes. Volume 1 is a
tabular listing of diagnosis codes. Volume 2 is an index for those diagnosis codes. Volume
3 consists of hospital inpatient procedure codes. This may seem rudimentary to
some, however, this division is important to understand the proposed coming
changes.
ICD-10 CHANGES
There are several changes in the ICD-10. Because of the close
relation of ICD-CM to the original ICD, it is important to note that these changes will
become part of the ICD-10-CM. Some of the biggest changes are as follows:
1. ICD-10 is much bigger with almost twice the categories of ICD-9.
2. ICD-10 uses alphanumeric categories instead of numeric only.
3. ICD-10 changed chapters, categories, titles and regrouped conditions.
ICD-10-CM
With the release of volume 1 of the ICD-10 in 1992 by WHO, the
United States requested and was granted permission to develop an adaptation of ICD-10 for
use in the United States for government purposes. Currently, this clinical modification is
under way and is being called ICD-10-CM. Other countries have already made or are
developing their own modifications of ICD-10 for use within their respective countries.
It has been proposed that ICD-10-CM will replace ICD-9-CM volumes 1 and 2 only. Like the ICD-9-CM
system, this new coding system is closely related to its ICD counterpart (ICD-10).
Therefore, it closely follows the changes to ICD-10. It contains significantly
more codes than the current ICD-9-CM. It is also alpha numeric and has up to seven digits.
Please note that volume 3 (the inpatient procedures) is not included in
ICD-10-CM. A separate coding system has been proposed as a replacement called ICD-10-PCS
(procedure coding system). This volume 3 replacement is discussed in greater detail under
the heading ICD-10-PCS.
ICD-10-CM WHEN?
This is the main question asked by providers. Just when are all
these changes going to effect my office? Currently, no one knows for sure. Just like the
MCCA of 1988, in 1996 Congress passed the Health Insurance Portability and Accountability
Act (HIPAA) and that has created another wrinkle in the time line of ICD-10-CM.
Part of the HIPAA law changes the way that new coding systems are approved in the US.
According to The Administrative Simplification requirements, there are new rules to
establish national standards for code sets and that these code sets become the national
standards two years after publication of the final notice.
Because of these legislated requirements, the May 1999 meeting of the ICD-9-CM
Coordination and Maintenance Committee covered this issue. The following information was
included in the official minutes:
"There has been a change in the manner in which new coding
systems are approved for use in this country. The Administrative Simplification
requirements of the Heath Insurance Portability and Accountability Act (HIPAA) require the
establishment of national standards for code sets. This act requires proposed and final
rules establishing initial national code sets.
A notice of proposed rule making (NPRM) on Transactions was published May 7, 1998
(63 Federal Register (FR) 25272). This NPRM proposes, for the most part, that the existing
coding systems become the national standards. For hospital inpatient reporting, the NPRM
proposed ICD-9-CM. The comment period closed on July 6, 1998 and the comments are being
reviewed. It is anticipated that the final notice will be published in 1999.
Additional information on Administrative Simplification including
NPRMs published to date can be found at the following location on the Internet: http://aspe.os.dhhs.gov/admnsimp/
With the pre-release available and the HIPAA request under review, we are getting much closer to the final notice. However, no final notice has been made, so continue using the official HIPAA code sets which include ICD-9-CM.
ICD-10-PCS (Procedure Coding System)
As for Volume 3 of ICD-9-CM, it has been proposed that it be
replaced by a new Procedure Coding System called ICD-10-PCS. These procedure codes are not
technically part of, nor derived in any shape or form from the ICD-10 by WHO. The current
ICD-9-CM volume 3 (inpatient procedure) system was not meeting all the needs of
providers and ICD-10 did not include procedures. Therefore, this coding system was
contractually developed by 3M Health Information Systems under the direction of the Health
Care Finance Administration (HCFA) - now known as the Center for Medicare & Medicaid Services (CMS).
This revolutionary new system (ICD-10-PCS) utilizes a seven digit alphanumeric coding
system which allows for completeness, expandability, multi-axial coding and standardized
terminology. One major enhancement is the inclusion of qualifier digit(s). These
qualifier(s) allows for better documentation of underlying issues affecting the procedure
performed. This is something that medical providers have wanted for many years.
This system is being acclaimed as far superior to previous coding systems - namely
ICD-9-CM volume 3 used by hospitals and CPT used by other providers. Of course the system
is not perfect and some people training with the system right now have expressed some
concerns over the sheer volume of new codes. Keep in mind that whenever there is change
there will be a learning curve. However, once learned, we believe this system will result
in faster and more accurate coding.
Like ICD-10-CM, implementation of ICD-10-PCS falls under the same rules and regulations
of HIPAA. This means that there has been no official decision made on when or if
ICD-10-PCS will be implemented. It is unknown whether this proposed system
will replace volume 3 of ICD-9-CM and/or CPT. It is another "wait and see"
situation.
WANT TO KNOW MORE?
To help you learn and bridge the gap between ICD-9 and ICD-10,
InstaCode Institute has made the following products available.
ICD-10-PCS TRAINING MANUALSDownload
Files: We have the PDF files for the training manual, the index, and the
tabular listing for ICD-10-PCS which you may download for only $10.
This one step installation includes Adobe Acrobat Reader 4.0 and lets you print out just
those sections applicable or of interest to you.
Order
& Download Here.
HARD COPY: The training manual is also available as a book
from 3M
Health Information Systems for $20 (plus S&H). The index and tabular listings are
$100 (incl S&H).
Glossary of Terms
AHA |
American Hospital Association |
AMA |
American Medical Association |
CDC |
Center for Disease Control |
CM |
Clinical Modification |
CMS |
Centers for Medicare & Medicaid Services |
CPT |
Current Procedural Terminology, © American Medical Association |
FR |
Federal Register |
HCFA |
Health Care Finance Administration |
ICD |
International Classification of Diseases |
ICD-10-PCS |
Proposed procedure coding system |
ICD-9-CM |
International Classification of Diseases, 9th Revision, Clinical
Modification |
MCCA |
Medicare Catastrophic Coverage Act of 1988 |
NCHS |
National Center for Health Statistics |
NPRM |
Notice of Proposed Rule Making |
WHO |
World Health Organization |
|
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For any questions please contact .