Gregg Philip Hartman, M.D.
Sports Medicine (Orthopaedic Surgery) Physician · Simi Valley, CA
Gregg Philip Hartman, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in Simi Valley, California, and NPI 1336105238, issued on Apr 21, 2006. Check the license (California A61757, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregg Philip Hartman
- Credential
- M.D.
- Primary taxonomy
- Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
- License number
- A61757 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2525 Erringer RD, Simi Valley, CA 93065
- Phone
- (805) 527-1404
- Enumerated
- Apr 21, 2006
- Record last updated
- Jul 14, 2025
- Fax
- (805) 527-5246
- Medicare enrollment
- Enrolled (PECOS I20050127000320); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1992
- Entity
- Type 1 · individual
Also registered at 2525 Erringer RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zade Batarseh, PA-CPhysician Assistant1306493267
- Molly Breckley, PTPhysical Therapist1063784510
- Khristina Caldarelli, PA-CPhysician Assistant1811622301
- Daniel Davis, MDSports Medicine (Orthopaedic Surgery) Physician1730150830
- Michael Fealy, MDSurgery of the Hand (Plastic Surgery) Physician1669468872
- Kyla Hendricks, PAPhysician Assistant1962587717
Verify Gregg Philip Hartman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61757Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024
116 Medicare Part D claims for 81 beneficiaries, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Meloxicam60 claims
- Methylprednisolone13 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $121.20
5 payments; by number, the most common kind was food and beverage; the largest payer was Bioventus LLC. The 2,400 providers of this specialty with any payment received $19,779.31 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
- Ventura Orthopedics Medical Group IncSimi Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sports Medicine (Orthopaedic Surgery) Physician providers in California
There are 384 sports medicine (orthopaedic surgery) physician records in California.
Other sports medicine (orthopaedic surgery) physician records in California
- Stephen Abelow, M.D.South Lake Tahoe, CA1356559082
- Paul Abeyta, MDBurlingame, CA1225126147
- Geoffrey Abrams, MDStanford, CA1285821223
- Gregory Adamson, M.D.Pasadena, CA1972590610
- Dennis Ainbinder, M.D.Encino, CA1124394424
- Melissa AlbersheimOrange, CA1922661362
- Bruce Albert, M.D.Irvine, CA1528041704
- Laura Alberton, M.D.La Jolla, CA1992770655
- Amit Alexander-Nathani, MDSanta Barbara, CA1144583428
- Husam AlmajedSan Francisco, CA1639749369
Common questions
What is Gregg Philip Hartman, M.D.'s NPI number?
Gregg Philip Hartman, M.D.'s National Provider Identifier (NPI) is 1336105238, issued on Apr 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregg Philip Hartman, M.D. located?
The NPPES record lists a practice address at 2525 Erringer RD, Simi Valley, CA, 93065. Phone: (805) 527-1404. Providers update this record themselves, so call before visiting.
How can I verify Gregg Philip Hartman, M.D.'s license?
NPPES lists California license number A61757, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregg Philip Hartman, M.D. prescribe under Medicare Part D?
In 2024, Gregg Philip Hartman, M.D. had 116 Medicare Part D claims for 81 beneficiaries; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.
What is Gregg Philip Hartman, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.