NPPES file of Aug 9, 2026

Gregory Lynn Davis, M.D.

Gynecology Physician · Chico, CA

Gregory Lynn Davis, M.D. is a gynecology physician with a practice address in Chico, California, and NPI 1497752877, issued on Jun 30, 2005. Check the license (California G73638, as entered in NPPES) on the Medical Board of California; 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
1497752877
Name
Gregory Lynn Davis
Credential
M.D.
Primary taxonomy
Gynecology Physician 207VG0400X
License number
G73638 CA
Self-reported in NPPES; status is on the state search
Practice location
1040 Mangrove Ave, Chico, CA 95926
Phone
(530) 345-0064
Enumerated
Jun 30, 2005
Record last updated
Jan 18, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicaid ID
00G736380 CA
Medicare enrollment
Enrolled (PECOS I20240430001988); accepts Medicare assignment
Medical or professional school
Loma Linda University School Of Medicine, 1982
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 gynecology physician records → All 369 in California → Look up another NPI →

Also registered at 1040 Mangrove Ave

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

  1. Robert Avilla, D.O.Family Medicine Physician1346687225
  2. Miranda Bedene, FNP-CFamily Nurse Practitioner1730033762
  3. Dewayne Caviness, MDGeneral Practice Physician1912938887
  4. Matthew Haselton, FNP-CPrimary Care Nurse Practitioner1558096453
  5. Kurt Johnson, M.D., INC.General Practice Physician1407881741
  6. Patria McKiernan, NPWomen's Health Nurse Practitioner1306277686

Verify Gregory Lynn Davis in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G73638    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 California license search

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11% fewer Medicare Part D claims than the average gynecology physician in 2024

265 Medicare Part D claims for 46 beneficiaries, against an average of 299 among the 1,919 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.

  1. Gregory Davis265
  2. Specialty average299

Most prescribed

  1. Estradiol50 claims
  2. Estradiol (Twice Weekly)48 claims
  3. Progesterone23 claims
  4. Fluocinonide16 claims
  5. Levothyroxine Sodium13 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: $171.62

3 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 1,398 providers of this specialty with any payment received $2,469.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Gregory Davis$171.62
  2. Specialty average$2,469.88

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

  1. Effingham Hospital IncRincon, GA

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

Gregory Lynn Davis among 369 gynecology physician records in California

Gregory Lynn Davis, M.D. is one of 369 gynecology physician records with a practice address in California. 60% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 91% newer
  • In a Medicare fileYes · 60% of these records are
  • In the CMS Doctors and Clinicians fileYes · 38% of these records are
  • Graduated1982 · median 1995 among the 141 with a school on file
  • Record last updated2019 · 70% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VG0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Gynecology Physician providers in California

There are 369 gynecology physician records in California.

All 369 in California → Every provider in Chico → Gynecology Physician nationwide →

The 8 gynecology physician records with the nearest ZIP codes

  1. Whitney Dixon, MDChico, CA 959261477655447
  2. Mark Schwabe, M.D.Chico, CA 959261437200227
  3. Lisa Hosbein, MDNevada City, CA 959591285843839
  4. Yvonne Read, NPNevada City, CA 959591972209112
  5. Arthur McCausland, M.D.Sacramento, CA 958641326330416
  6. William Kuntz, M.D.Sacramento, CA 958411861514085
  7. Louise Chiu, M.D.Sacramento, CA 958251356703565
  8. Ira Joyner, M.D.Sacramento, CA 958231467567834

Common questions

What is Gregory Lynn Davis, M.D.'s NPI number?

Gregory Lynn Davis, M.D.'s National Provider Identifier (NPI) is 1497752877, issued on Jun 30, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Gregory Lynn Davis, M.D. located?

The NPPES record lists a practice address at 1040 Mangrove Ave, Chico, CA, 95926. Phone: (530) 345-0064. Providers update this record themselves, so call before visiting.

How can I verify Gregory Lynn Davis, M.D.'s license?

NPPES lists California license number G73638, 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 Lynn Davis, M.D. prescribe under Medicare Part D?

In 2024, Gregory Lynn Davis, M.D. had 265 Medicare Part D claims for 46 beneficiaries; the average among gynecology physician prescribers was 299. 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.