UMLS Vocabularies

A

B

C

D

F

G

H

I

J

JABL

K

KCD5

M

N

O

P

Q

R

S

T

TKMT

U

V

VANDF

W

HCPCS (HCPCS - Healthcare Common Procedure Coding System) - Metathesaurus Representation

VSABs: HCPCS2023, HCDT2023, HCPT2023

Summary of Changes:

No changes to the HCPCS file format or Metathesaurua source processing.

Source Provided Files:

The Metathesaurus uses a fixed-length field file submitted by the Centers for Medicare & Medicaid Services (CMS). The file used for 2023 is: HCPC2023_JAN_CONTR.txt.

Not included: Field 2 (sequence number; character positions 6-10) is excluded from Metathesaurus processing.

Identifiers:

CODE: For HCPCS, HCPT, HCDT atoms: Field 1 (HCPCS Procedure or Modifier Code; Character positions 1-5).
For MTH_HT atoms: An MTHU# is generated during Metathesaurus source processing
SAUI: Not Applicable
SCUI: Same as "CODE"
SDUI: Not Applicable

Atoms (MRCONSO):

SAB assignment:
Atoms created from the HCPCS data file are assigned to an SAB based on their code:

HCPT: 2 or 5-digit numeric code or 4 digits followed by T or F
HCDT: "D" followed by 4 digits: HCDT
HCPCS: All other codes from the HCPCS data file, plus hierarchical terms generated during Metathesaurus source processing

Term Type	Origin
AB	CODE = procedure/modifier code (character positions 1-5) STR = Short Description SCUI = procedure/modifier code (character positions 1-5) TTY = "AB" is assigned to atoms with a Record id code of "3" and no "Termination Date" SUPPRESS = "Y"
AM	CODE = procedure/modifier code (character positions 1-5) STR = Short Description SCUI = procedure/modifier code (character positions 1-5) TTY = "AM" is assigned to atoms with a Record id code of "7" and no "Termination Date" SUPPRESS = "Y"
MP	CODE = procedure/modifier code (character positions 4-5) STR = Long Description SCUI = procedure/modifier code (character positions 1-5) TTY = "MP" is assigned to atoms with a Record id code of "7" and no "Termination Date."
MTH_HT	CODE = "MTHU#", assigned during Metathesaurus source processing STR = value of Metathesaurus Hierarchical Term SCUI = "MTHU#", assigned during Metathesaurus source processing Note: The standard HCPCS data files do not include a hierarchy. The National Library of Medicine uses the printed book and other resources to generate a hierarchy during Metathesaurus source processing. This hierarchy has not been reviewed by CMS.
OA	CODE = procedure/modifier code (character positions 1-5) STR = Short Description SCUI=procedure/modifier code (character positions 1-5) TTY = "OA" is assigned to atoms with a Record id code of "3" and a non-blank "Termination Date." SUPPRESS = "O"
OAM	CODE = procedure/modifier code (character positions 4-5) STR = Short Description SCUI = procedure/modifier code (character positions 1-5). TTY = "OAM" is assigned to atoms with a Record id code of "7" and a non-blank "Termination Date." SUPPRESS = "O"
OM	CODE = procedure/modifier code (character positions 4-5) STR = Long Description; SCUI=procedure/modifier code (character positions 1-5). TTY = "OM" is assigned to atoms with a Record id code of "7" and a non-blank "Termination Date." SUPPRESS = "O"
OP	CODE = procedure/modifier code (character positions 1-5) STR = Long Description SCUI = procedure/modifier code (character positions 1-5) TTY = "OP" is assigned to atoms with a Record id code of "3" and a non-blank "Termination Date." SUPPRESS = "O"
PT	CODE = procedure/modifier code (character positions 1-5) STR = Long Description SCUI = procedure/modifier code (character positions 1-5) TTY = "PT" is assigned to atoms with a Record id code of "3" and no "Termination Date."

Attributes (MRSAT):

Attribute Name	Origin
CPF	HCPCS Long Description (character positions 12-91). For modifiers, the STR is truncated at the ":", and the entire Long Description is represented with ATN=CPF.
HAC	HCPCS Action Code (charcter position 293). Expanded values for each Action Code are included in the ATV, e.g. "N=No maintenance for this code"
HAD	HCPCS Action Effective Date (character positions 277-284)
HAQ	HCPCS Anesthesia Base Unit Quantity (character positions 266-268)
HBT	HCPCS Berenson-Eggers Type Of Service Code (character positions 257-259)
HCC	HCPCS Coverage Code (character position 230)
HCD	HCPCS Code Added Date (character positions 269-276)
HIR	HCPCS Coverage Issues Manual Reference Section Number (character posistions 129-134)
HLC	HCPCS Lab Certification Code (character positions 181-183)
HMP	HCPCS Multiple Pricing Indicator Code (character position 128)
HMR	HCPCS Medicare Carriers Manual Reference Section Number (character positions 147-154)
HPD	HCPCS ASC Payment Group Effective Date (character positions 233-240)
HPG	HCPCS ASC Payment Group Code (character positions 231-232)
HPI	HCPCS Pricing Indicator Code (character positions 120-121)
HPN	HCPCS Processing Note Number (character positions 253-256)
HSN	HCPCS Statute Number (character positions 171-180)
HTD	HCPCS Termination Date (character positions 285-292)
HTS	HCPCS Type Of Service Code (character position 261)
HXR	HCPCS Cross Reference Code (character positions 205-209)

Definitions (MRDEF):

No definitions are included with the standard format HCPCS release.

Relationships (MRREL):

Relationship	RELA/Inverse RELA	Origin
CHD PAR		Hierarchy created by the NLM during Metathesaurus source processing. This hierarchy has not been reviewed by CMS, and is attributed to TTY = "MTH_HT"
RQ	mapped_from mapped_to	HCPCS Cross Reference Code (character positions 205-209). (Note: A small number of cross references are provided to invalid codes or ranges of codes. These are not made into relationships, however the data is included in the HXR attribute.)
SY	expanded_form_of has_expanded_form	Connect a PT with its AB

Mappings (MRMAP):

No mapping data to other sources is included for HCPCS

Unified Medical Language System (UMLS)