Robert Isaacs, MD
NPI 1912927286 · Family Medicine Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Isaacs, MD is a Family Medicine Physician provider in Santa Rosa, CA (NPI 1912927286).
Provider details
- NPI number
- 1912927286
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 18222 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
159 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 133 | $178 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 26 | $81 |
Typical Medicare-allowed amounts for these services range $81–$178 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (3)
- 4053 Lone Tree WayAntioch, CA 94531-6210Phone: (925) 756-0849Fax: (925) 757-0849
- 2500 Milvia StBerkeley, CA 94704-2636Phone: (510) 204-5600Fax: (510) 204-5462
- 20101 Lake Chabot Rd Fl 1Castro Valley, CA 94546-5305Phone: (510) 886-3400Fax: (510) 866-8466
Registry dates
- Enumerated
- 2006-07-20
- Last updated
- 2019-04-24
Frequently asked questions
- What is Robert Isaacs's NPI number?
- Robert Isaacs's National Provider Identifier (NPI) is 1912927286, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Isaacs's specialty?
- Robert Isaacs is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Isaacs located?
- Robert Isaacs's practice location on file with NPPES is 1287 Fulton Rd, Santa Rosa, CA 95401-4923.
- What is Robert Isaacs's phone number?
- The practice phone number listed in the NPPES registry for Robert Isaacs is (707) 888-5808.
- Does Robert Isaacs accept Medicare?
- Robert Isaacs is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Isaacs's NPI active?
- Yes — Robert Isaacs's NPI (1912927286) is active in the NPPES registry as of the last update on 2019-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.