Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MISS DONALD MILLS MATHESON M.D.
NPI 1629060900
Family Medicine in Willits, CA

Q: What is Donald Matheson's NPI number?

The NPI number for Donald Matheson is 1629060900. It was assigned to this individual provider in the NPPES registry on August 22, 2005.

Q: What is Donald Matheson's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Donald Matheson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 40 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 22, 2005PECOS EnrolledAccepts Medicare Assignment

1245 S MAIN ST, WILLITS, CA 95490(707) 459-6861(707) 459-3057 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Miss Donald Mills Matheson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MISS DONALD MILLS MATHESON M.D. (NPI 1629060900) is an individual family medicine provider in Willits, California, licensed in California (G25745) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS and is a graduate of Stanford University School Of Medicine (1972).

NPPES Registry Identity

NPI1629060900

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameMISS DONALD MILLS MATHESONCredential: M.D.

Location Address1245 S MAIN STWillits, CA 95490-4305

Mailing Address1245 S Main StWillits, CA 95490-4305 · (707) 459-6861 · Fax (707) 459-3057

Phone(707) 459-6861

Fax(707) 459-3057

Sole ProprietorNo

Medical School CMSStanford University School Of MedicineGraduated 1972

Enumeration DateAugust 22, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1629060900 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · G25745

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

1245 S MAIN ST, Willits, CA 95490

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Miss Donald Mills Matheson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1052509718

PECOS Enrollment IDI20110107000304

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

85 services51 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

46 services46 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus 87426

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

14 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95490 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$90.32 typical visit price

range $58.87 – $176.60

Typical copayment $22.58 (range $14.71 – $44.15)

Most-billed visit code 99203

Established Patient

$103.36 typical visit price

range $19.28 – $144.60

Typical copayment $25.84 (range $4.82 – $36.15)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MISS MIRIAM IDA HARRIS M.D.

Family Medicine