NPPES file of Aug 9, 2026

Hillary Gayle Hendryk, M.D.

Obstetrics & Gynecology Physician · Modesto, CA

Hillary Gayle Hendryk, M.D. is an obstetrics & gynecology physician with a practice address in Modesto, California, and NPI 1528370616, issued on Jul 6, 2010. Check the license (California 130809, 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
1528370616
Name
Hillary Gayle Hendryk
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
130809 CA
R72247 AZ
Self-reported in NPPES; status is on the state search
Practice location
1401 Spanos CT Ste 230, Modesto, CA 95355
Phone
(209) 550-4720
Enumerated
Jul 6, 2010
Record last updated
Dec 18, 2025
Fax
(209) 572-2583
Medicare enrollment
Enrolled (PECOS I20150106000961); accepts Medicare assignment
Medical or professional school
Oregon Health Sciences University School Of Medicine, 2010
Telehealth
Offers telehealth (CMS)
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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Also registered at 1401 Spanos CT Ste 230

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

  1. Rocio Acera Pozzi, MDObstetrics & Gynecology Physician1619310737
  2. Marissa Buendia, DOObstetrics & Gynecology Physician1982226791
  3. Olga Kovalenko, MDObstetrics & Gynecology Physician1710514674
  4. Joseph Mansour, MDObstetrics & Gynecology Physician1679668420
  5. Stephane ZamayoaSocial Worker1467975037

Verify Hillary Gayle Hendryk in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license 130809    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

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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1% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024

167 Medicare Part D claims for 65 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.

  1. Hillary Hendryk167
  2. Specialty average165

Most prescribed

  1. Estradiol42 claims
  2. Betamethasone Valerate11 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.

Bills Medicare through one group practice

  1. Sutter Valley Medical FoundationModesto, CA

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

Obstetrics & Gynecology Physician providers in California

There are 5,088 obstetrics & gynecology physician records in California.

All 5,088 in California → Every provider in Modesto →

Other obstetrics & gynecology physician records in California

  1. Ingrid Aalami, MDSan Jose, CA1952376550
  2. Avisa Abaian- Eagar, M.D.Orange, CA1316057755
  3. Derek Abbassi, MDWalnut Creek, CA1841364155
  4. Ahmed Abdelaziz, MDSanta Maria, CA1790039733
  5. Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
  6. Nicole Abell, DOVentura, CA1811243603
  7. Zachary AbelsonLos Angeles, CA1689237414
  8. Ray Abinader, M.D.Loma Linda, CA1770901548
  9. Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
  10. Nada Abou-HaibaLos Angeles, CA1134067549

Common questions

What is Hillary Gayle Hendryk, M.D.'s NPI number?

Hillary Gayle Hendryk, M.D.'s National Provider Identifier (NPI) is 1528370616, issued on Jul 6, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Hillary Gayle Hendryk, M.D. located?

The NPPES record lists a practice address at 1401 Spanos CT Ste 230, Modesto, CA, 95355. Phone: (209) 550-4720. Providers update this record themselves, so call before visiting.

How can I verify Hillary Gayle Hendryk, M.D.'s license?

NPPES lists California license number 130809, 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 Hillary Gayle Hendryk, M.D. prescribe under Medicare Part D?

In 2024, Hillary Gayle Hendryk, M.D. had 167 Medicare Part D claims for 65 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.