Douglas Freeman, M.D.
NPI 1588760110 · Family Medicine Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Freeman, M.D. is a Family Medicine Physician provider in Fairfield, CA (NPI 1588760110).
Provider details
- NPI number
- 1588760110
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C 51473 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,692 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 912 | $145 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 297 | $147 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 111 | $92 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 105 | $23 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 85 | $103 |
| Photography of the Retina92250 | 31 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 123 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 600 | 168 |
| Amlodipine Besylate | 432 | 137 |
| Losartan Potassium | 254 | 74 |
| Levothyroxine Sodium | 243 | 61 |
| Metformin Hcl | 238 | 68 |
| Omeprazole | 233 | 56 |
| Rosuvastatin Calcium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$116 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2010-05-17
Frequently asked questions
- What is Douglas Freeman's NPI number?
- Douglas Freeman's National Provider Identifier (NPI) is 1588760110, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Freeman's specialty?
- Douglas Freeman is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Freeman located?
- Douglas Freeman's practice location on file with NPPES is 2458 Hilborn Rd, Fairfield, CA 94534-1072.
- What is Douglas Freeman's phone number?
- The practice phone number listed in the NPPES registry for Douglas Freeman is (707) 646-5500.
- Does Douglas Freeman accept Medicare?
- Douglas Freeman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Freeman's NPI active?
- Yes — Douglas Freeman's NPI (1588760110) is active in the NPPES registry as of the last update on 2010-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.