NPPES file of Aug 9, 2026

Mark Colin Clark, M.D.

Specialist · Austin, TX

Mark Colin Clark, M.D. is a specialist with a practice address in Austin, Texas, and NPI 1376568691, issued on Jul 13, 2006. Check the license (Texas F2197, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1376568691
Name
Mark Colin Clark
Credential
M.D.
Primary taxonomy
Specialist 174400000X
License number
F2197 TX
Self-reported in NPPES; status is on the state search
Practice location
1305 W 34TH St, Austin, TX 78705
Phone
(512) 459-6599
Enumerated
Jul 13, 2006
Record last updated
Mar 4, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(512) 459-8496
Medicaid ID
137591707 TX
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest specialist records → All 1,716 in Texas → Look up another NPI →

Also registered at 1305 W 34TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. William Deaton, M.D.Pulmonary Disease Physician1962435461
  2. Wesley Glazener, M.D.Pediatrics Physician1104880301
  3. Mary Jones, R.N., M.S.N., F.N.P.Family Nurse Practitioner1104961804
  4. Nancy Loomis, CNPAdvanced Practice Midwife1811904113
  5. Felicia Nash, MDObstetrics & Gynecology Physician1427093095
  6. Erwin Rost, DDSGeneral Practice Dentistry1205982055

Verify Mark Colin Clark in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Texas board licenses this profession
    Search for license F2197    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

99% fewer Medicare Part D claims than the average specialist in 2024

16 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.

  1. Mark Clark16
  2. Specialty average1,380

Most prescribed

  1. Dupixent Syringe14 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Mark Colin Clark among 1,716 specialist records in Texas

Mark Colin Clark, M.D. is one of 1,716 specialist records with a practice address in Texas. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 17% of them.

  • NPI issued2006 · 17% of these records are older, 46% newer
  • In a Medicare fileYes · 31% of these records are
  • In the CMS Doctors and Clinicians fileNo · 18% of these records are
  • Record last updated2011 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in Texas

There are 1,716 specialist records in Texas.

All 1,716 in Texas → Every provider in Austin → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Haley Beasley, MDAustin, TX 787051982683116
  2. Stephanie Booth, M.D.Austin, TX 787051356300990
  3. Roberta Braun, MDAustin, TX 787051811088255
  4. Robert Ersek, M.D., F.A.C.S.Austin, TX 787051609952134
  5. Wayne Hardwick, M.D.Austin, TX 787051518934108
  6. Thomas Hill, M.D.Austin, TX 787051457321077
  7. Albert Horn, MDAustin, TX 787051497750392
  8. Joe Juren, M.D.Austin, TX 787051407848567

Common questions

What is Mark Colin Clark, M.D.'s NPI number?

Mark Colin Clark, M.D.'s National Provider Identifier (NPI) is 1376568691, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Colin Clark, M.D. located?

The NPPES record lists a practice address at 1305 W 34TH St, Austin, TX, 78705. Phone: (512) 459-6599. Providers update this record themselves, so call before visiting.

How can I verify Mark Colin Clark, M.D.'s license?

NPPES lists Texas license number F2197, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.

How much does Mark Colin Clark, M.D. prescribe under Medicare Part D?

In 2024, Mark Colin Clark, M.D. had 16 Medicare Part D claims; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.