Katherine Estlin, MD
Family Medicine Physician · Fortuna, CA
Katherine Estlin, MD is a family medicine physician with a practice address in Fortuna, California, and NPI 1255574885, issued on Apr 13, 2009. Check the license (California A143957, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine Estlin
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A143957 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3429 Renner Dr, Fortuna, CA 95540
- Phone
- (707) 726-2255
- Enumerated
- Apr 13, 2009
- Entity
- Type 1 · individual
Also registered at 3429 Renner Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adalizette AguilarCase Manager/Care Coordinator1285505503
- Jennifer Brown, LCSWClinical Social Worker1568709269
- Brian Calvert, O.D.Optometrist1790778017
- Stephanie Dittmer, MDFamily Medicine Physician1942422688
- Dylan HeardCase Manager/Care Coordinator1912878109
- Alyse Laverne, LMFTMarriage & Family Therapist1336762376
Verify Katherine Estlin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A143957Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
45% fewer Medicare Part D claims than the average family medicine physician in 2024
1,939 Medicare Part D claims for 82 beneficiaries, against an average of 3,519 among the 111,126 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 34 claims were for opioids.
Most prescribed
- Atorvastatin Calcium141 claims
- Ozempic66 claims
- Levothyroxine Sodium65 claims
- Gabapentin63 claims
- Losartan Potassium63 claims
- Hydrochlorothiazide58 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: $76.66
3 payments, mostly food and beverage; the largest payer was Amgen Inc.. The 53,013 providers of this specialty with any payment received $861.30 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.
One hospital or facility affiliation
- Ikigai Physician Group IncFortuna, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
13 family medicine physician records list a Fortuna practice address
They are 13 of the 173 NPPES records with a Fortuna practice address, and 16,272 family medicine physician records in California.
All 13 in Fortuna → All 16,272 in California → Every provider in Fortuna →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Katherine Estlin, MD's NPI number?
Katherine Estlin, MD's National Provider Identifier (NPI) is 1255574885, issued on Apr 13, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Estlin, MD located?
The NPPES record lists a practice address at 3429 Renner Dr, Fortuna, CA, 95540. Phone: (707) 726-2255. Providers update this record themselves, so call before visiting.
How can I verify Katherine Estlin, MD's license?
NPPES lists California license number A143957, 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 Katherine Estlin, MD prescribe under Medicare Part D?
In 2024, Katherine Estlin, MD had 1,939 Medicare Part D claims for 82 beneficiaries; the average among family medicine physician prescribers was 3,519. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.