Gregory Leigh Johnson, M.D.
Pediatric Cardiology Physician · Austin, TX
Gregory Leigh Johnson, M.D. is a pediatric cardiology physician with a practice address in Austin, Texas, and NPI 1437107331, issued on May 4, 2006. Check the license (Texas K0846, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Leigh Johnson
- Credential
- M.D.
- Primary taxonomy
- Pediatric Cardiology Physician 2080P0202X
- License number
- K0846 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4314 Medical Pkwy, Austin, TX 78756
- Phone
- (512) 454-1110
- Enumerated
- May 4, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (512) 374-1354
- Medicaid ID
- 137308612 TX
- Medicare enrollment
- Enrolled (PECOS I20050310000660); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest pediatric cardiology physician records → All 325 in Texas → Look up another NPI →
Also registered at 4314 Medical Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arnold Fenrich, MDPediatric Cardiology Physician1790736494
- James Finnigan, M.D.Pediatric Cardiology Physician1154386753
- Walter Harrell, PH.D.Rehabilitation Psychologist1992919120
- Hanoch Patt, M.D.Pediatric Cardiology Physician1730113754
- Stuart Rowe, M.D.Pediatric Cardiology Physician1811954787
- Kenneth Shaffer, M.D.Pediatric Cardiology Physician1922062652
Verify Gregory Leigh Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K0846Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.1 times the Medicare Part D claims of the average pediatric cardiology physician in 2024
231 Medicare Part D claims for 29 beneficiaries, against an average of 74 among the 518 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Metoprolol Succinate41 claims
- Digoxin32 claims
- Bosentan24 claims
- Losartan Potassium22 claims
- Spironolactone13 claims
- Eliquis11 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.
Industry payments in 2024: $325.03
4 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 1,156 providers of this specialty with any payment received $2,864.57 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Dell Childrens Medical GroupRound Rock, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Leigh Johnson among 325 pediatric cardiology physician records in Texas
Gregory Leigh Johnson, M.D. is one of 325 pediatric cardiology physician records with a practice address in Texas. 71% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 64% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1989 · median 2004 among the 163 with a school on file
- Record last updated2007 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080P0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pediatric Cardiology Physician providers in Texas
There are 325 pediatric cardiology physician records in Texas.
All 325 in Texas → Every provider in Austin → Pediatric Cardiology Physician nationwide →
The 8 pediatric cardiology physician records with the nearest ZIP codes
- Arnold Fenrich, MDAustin, TX 787561790736494
- James Finnigan, M.D.Austin, TX 787561154386753
- Hanoch Patt, M.D.Austin, TX 787561730113754
- Stuart Rowe, M.D.Austin, TX 787561811954787
- Kenneth Shaffer, M.D.Austin, TX 787561922062652
- Daniel Shmorhun, M.D.Austin, TX 787561841251246
- Eileen Stewart, M.D.Austin, TX 787561245403146
- Karen Wright, M.D.Austin, TX 787561356396444
Common questions
What is Gregory Leigh Johnson, M.D.'s NPI number?
Gregory Leigh Johnson, M.D.'s National Provider Identifier (NPI) is 1437107331, issued on May 4, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Leigh Johnson, M.D. located?
The NPPES record lists a practice address at 4314 Medical Pkwy, Austin, TX, 78756. Phone: (512) 454-1110. Providers update this record themselves, so call before visiting.
How can I verify Gregory Leigh Johnson, M.D.'s license?
NPPES lists Texas license number K0846, 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.
How much does Gregory Leigh Johnson, M.D. prescribe under Medicare Part D?
In 2024, Gregory Leigh Johnson, M.D. had 231 Medicare Part D claims for 29 beneficiaries; the average among pediatric cardiology physician prescribers was 74. 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.
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.