NPPES file of Aug 9, 2026

Robert C. Johnston, M.D.

Maternal & Fetal Medicine Physician · Austin, TX

Robert C. Johnston, M.D. is a maternal & fetal medicine physician with a practice address in Austin, Texas, and NPI 1003194853, issued on Jul 28, 2011. Check the license (Texas R6421, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

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

NPPES recordNPPES file of Aug 9, 2026
1003194853
Name
Robert C. Johnston
Credential
M.D.
Primary taxonomy
Maternal & Fetal Medicine Physician 207VM0101X
License numbers
R6421 TX
A125165 CA
Self-reported in NPPES; status is on the state search
Practice location
12200 Renfert Way Ste G-3, Austin, TX 78758
Phone
(512) 821-2540
Enumerated
Jul 28, 2011
Record last updated
Dec 27, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(512) 973-3533
Medicare enrollment
Enrolled (PECOS I20150619002373); accepts Medicare assignment
Medical or professional school
University Of Vermont College Of Medicine, 2011
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest maternal & fetal medicine physician records → All 308 in Texas → Look up another NPI →

Also registered at 12200 Renfert Way Ste G-3

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

  1. Marissa Berry, MDMaternal & Fetal Medicine Physician1528622792
  2. Sandra Herrera, M.D.Maternal & Fetal Medicine Physician1902124001
  3. Kerry Holliman, M.D.Maternal & Fetal Medicine Physician1528080892
  4. Nicholas Spencer, M.D.Maternal & Fetal Medicine Physician1699121665

Verify Robert C. Johnston in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license R6421    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
Open 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.

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Bills Medicare through one group practice

  1. Southern California Permanente Medical GroupSan Diego, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Robert C. Johnston among 308 maternal & fetal medicine physician records in Texas

Robert C. Johnston, M.D. is one of 308 maternal & fetal medicine physician records with a practice address in Texas. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 68% of them.

  • NPI issued2011 · 68% of these records are older, 27% newer
  • In a Medicare fileYes · 77% of these records are
  • In the CMS Doctors and Clinicians fileYes · 61% of these records are
  • Graduated2011 · median 2006 among the 187 with a school on file
  • Record last updated2021 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VM0101X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Maternal & Fetal Medicine Physician providers in Texas

There are 308 maternal & fetal medicine physician records in Texas.

All 308 in Texas → Every provider in Austin → Maternal & Fetal Medicine Physician nationwide →

The 8 maternal & fetal medicine physician records with the nearest ZIP codes

  1. Marissa Berry, MDAustin, TX 787581528622792
  2. Sandra Herrera, M.D.Austin, TX 787581902124001
  3. Kerry Holliman, M.D.Austin, TX 787581528080892
  4. Cecilia Lyons Gaffaney, M.D.Austin, TX 787581457399925
  5. Luis Monsivais, M.D.Austin, TX 787581285079483
  6. Nicholas Spencer, M.D.Austin, TX 787581699121665
  7. Robert Patterson, M.D.Rollingwood, TX 787461417357211
  8. David Berry, M.D.Austin, TX 787311609052950

Common questions

What is Robert C. Johnston, M.D.'s NPI number?

Robert C. Johnston, M.D.'s National Provider Identifier (NPI) is 1003194853, issued on Jul 28, 2011. An NPI identifies a provider in billing; it is not a license.

Where is Robert C. Johnston, M.D. located?

The NPPES record lists a practice address at 12200 Renfert Way Ste G-3, Austin, TX, 78758. Phone: (512) 821-2540. Providers update this record themselves, so call before visiting.

How can I verify Robert C. Johnston, M.D.'s license?

NPPES lists Texas license number R6421, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.