Gregory Thomas Hartt, M.D.
Emergency Medicine Physician · Redding, CA
Gregory Thomas Hartt, M.D. is an emergency medicine physician with a practice address in Redding, California, and NPI 1972710895, issued on May 17, 2007. Check the license (California A98062, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Thomas Hartt
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A98062 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2175 Rosaline Ave, Redding, CA 96001
- Phone
- (530) 225-6000
- Enumerated
- May 17, 2007
- Record last updated
- Oct 12, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 2175 Rosaline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Khin Aung, M.DInternal Medicine Physician1154732154
- Sukhpreet BadeshaStudent in an Organized Health Care Education/Training Program1467048249
- Shaina Beer, AGACNP-BCAcute Care Nurse Practitioner1811593106
Verify Gregory Thomas Hartt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A98062Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average emergency medicine physician in 2024
274 Medicare Part D claims for 182 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 31 claims were for opioids.
Most prescribed
- Prednisone29 claims
- Cephalexin24 claims
- Ondansetron Odt18 claims
- Doxycycline Monohydrate14 claims
- Hydrocodone-Acetaminophen13 claims
- Oxycodone Hcl12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Gregory Thomas Hartt among 7,751 emergency medicine physician records in California
Gregory Thomas Hartt, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 emergency medicine physician records list a practice address in Redding
They are 39 of the 3,572 NPPES records with a practice address in Redding, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Redding → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Robert Duvoisin, DORedding, CA 960011790704419
- John Everett, DORedding, CA 960011235158957
- Federico Grabiel, MDRedding, CA 960011174549901
- Julie Hamilton, MDRedding, CA 960011700813425
- Robert Hamilton, MDRedding, CA 960011407885759
- Pamela Ikuta, DORedding, CA 960011902822745
- Robert Lawson, MDRedding, CA 960011891713145
- Christopher Louisell, MDRedding, CA 960011952321689
Common questions
What is Gregory Thomas Hartt, M.D.'s NPI number?
Gregory Thomas Hartt, M.D.'s National Provider Identifier (NPI) is 1972710895, issued on May 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Thomas Hartt, M.D. located?
The NPPES record lists a practice address at 2175 Rosaline Ave, Redding, CA, 96001. Phone: (530) 225-6000. Providers update this record themselves, so call before visiting.
How can I verify Gregory Thomas Hartt, M.D.'s license?
NPPES lists California license number A98062, 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 Gregory Thomas Hartt, M.D. prescribe under Medicare Part D?
In 2024, Gregory Thomas Hartt, M.D. had 274 Medicare Part D claims for 182 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Gregory Thomas Hartt, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.