Katrina Dionne Baker, MD
Obstetrics & Gynecology Physician · Lancaster, CA
Katrina Dionne Baker, MD is an obstetrics & gynecology physician with a practice address in Lancaster, California, and NPI 1538154836, issued on Sep 13, 2005. Check the license (California A86765, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katrina Dionne Baker
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- A86765 CA
Self-reported in NPPES; status is on the state search - Practice location
- 44241 15TH St W, Lancaster, CA 93534
- Phone
- (661) 948-4691
- Enumerated
- Sep 13, 2005
- Record last updated
- Dec 13, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (661) 949-5831
- Medicare enrollment
- Enrolled (PECOS I20140315000385); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 44241 15TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachel Allen, NPFamily Nurse Practitioner1104327881
- Jackson Fu, MDObstetrics & Gynecology Physician1871581637
- Laura Galeazzi, A.C.N.P.Acute Care Nurse Practitioner1982006748
- Russell Greif, D.O.Internal Medicine Physician1669519765
- Karen Tison, M.D.Ophthalmology Physician1164476248
Verify Katrina Dionne Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A86765Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
204 Medicare Part D claims for 58 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Estradiol69 claims
- Progesterone26 claims
- Premarin22 claims
- Alendronate 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: $189.27
8 payments; by number, the most common kind was food and beverage; the largest payer was Ethicon US, LLC. 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.
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Ahmed Abdelaziz, MDSanta Maria, CA1790039733
- Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
Common questions
What is Katrina Dionne Baker, MD's NPI number?
Katrina Dionne Baker, MD's National Provider Identifier (NPI) is 1538154836, issued on Sep 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Katrina Dionne Baker, MD located?
The NPPES record lists a practice address at 44241 15TH St W, Lancaster, CA, 93534. Phone: (661) 948-4691. Providers update this record themselves, so call before visiting.
How can I verify Katrina Dionne Baker, MD's license?
NPPES lists California license number A86765, 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 Katrina Dionne Baker, MD prescribe under Medicare Part D?
In 2024, Katrina Dionne Baker, MD had 204 Medicare Part D claims for 58 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.