Gregory R. Klis, MD
Obstetrics & Gynecology Physician · Bakersfield, CA
Gregory R. Klis, MD is an obstetrics & gynecology physician with a practice address in Bakersfield, California, and NPI 1508844648, issued on Jan 9, 2006. Check the license (California G83369, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory R. Klis
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G83369 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Old River RD, Bakersfield, CA 93311
- Phone
- (661) 663-4800
- Enumerated
- Jan 9, 2006
- Record last updated
- Jul 21, 2022
- Fax
- (661) 663-4871
- Medicare enrollment
- Enrolled (PECOS I20081121000134); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1992
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 100 Old River RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rochelle Anzaldo, RDNRegistered Dietitian1629617758
- Rhonda Colvin, PA-CMulti-Specialty Group1285940635
- Wendy Crenshaw, MDObstetrics & Gynecology Physician1205814340
- Lynn Del Mundo, PAPhysician Assistant1710604079
- Noel Del Mundo, M.D.Obstetrics & Gynecology Physician1245319805
- Crystal Hoffmann, ED.D.Student in an Organized Health Care Education/Training Program1528947074
Verify Gregory R. Klis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G83369Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
543 Medicare Part D claims for 179 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 22 claims were for opioids.
Most prescribed
- Estradiol175 claims
- Progesterone48 claims
- Oxybutynin Chloride Er39 claims
- Medroxyprogesterone Acetate28 claims
- Clotrimazole-Betamethasone27 claims
- Ibuprofen27 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: $728.84
26 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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.
Gregory R. Klis among 5,088 obstetrics & gynecology physician records in California
Gregory R. Klis, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1992 · median 2004 among the 2,700 with a school on file
- Record last updated2022 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (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 Bakersfield → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Todd Andrews, M.D.Bakersfield, CA 933111407894215
- Wendy Crenshaw, MDBakersfield, CA 933111205814340
- Noel Del Mundo, M.D.Bakersfield, CA 933111245319805
- Lon Graves, M.D.Bakersfield, CA 933111831122993
- Tillaikarasi Kannappan, MDBakersfield, CA 933111598743635
- Luis Lopez, MDBakersfield, CA 933111992818322
- Marietta Marzan-Tan, MDBakersfield, CA 933111336127372
- Arthur Park, M.D.Bakersfield, CA 933111992738843
Common questions
What is Gregory R. Klis, MD's NPI number?
Gregory R. Klis, MD's National Provider Identifier (NPI) is 1508844648, issued on Jan 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory R. Klis, MD located?
The NPPES record lists a practice address at 100 Old River RD, Bakersfield, CA, 93311. Phone: (661) 663-4800. Providers update this record themselves, so call before visiting.
How can I verify Gregory R. Klis, MD's license?
NPPES lists California license number G83369, 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 R. Klis, MD prescribe under Medicare Part D?
In 2024, Gregory R. Klis, MD had 543 Medicare Part D claims for 179 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.
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.