Maria Inmaculada Cobos Sillero, MD, PHD
NPI 1598051427 · Anatomic Pathology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Inmaculada Cobos Sillero, MD, PHD is a Anatomic Pathology Physician provider in Stanford, CA (NPI 1598051427).
Provider details
- NPI number
- 1598051427
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
- License
- A139333 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
183 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) |
|---|---|---|
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 69 | $32 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 50 | $93 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 29 | $39 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 21 | $42 |
| Pathology Examination of Specimen During Surgery, First Tissue Block88331 | 14 | $70 |
Typical Medicare-allowed amounts for these services range $32–$93 (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 (2)
- Massachusetts General Hospital55 Fruit StreetBoston, MA 02114Phone: (617) 726-2967
- Massachusetts General Hospital55 Fruit StreetBoston, MA 02114Phone: (617) 726-2967
Registry dates
- Enumerated
- 2011-06-20
- Last updated
- 2019-07-02
Frequently asked questions
- What is Maria Inmaculada Cobos Sillero's NPI number?
- Maria Inmaculada Cobos Sillero's National Provider Identifier (NPI) is 1598051427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Inmaculada Cobos Sillero's specialty?
- Maria Inmaculada Cobos Sillero is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Inmaculada Cobos Sillero located?
- Maria Inmaculada Cobos Sillero's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305.
- What is Maria Inmaculada Cobos Sillero's phone number?
- The practice phone number listed in the NPPES registry for Maria Inmaculada Cobos Sillero is (650) 723-6041.
- Does Maria Inmaculada Cobos Sillero accept Medicare?
- Maria Inmaculada Cobos Sillero is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Inmaculada Cobos Sillero's NPI active?
- Yes — Maria Inmaculada Cobos Sillero's NPI (1598051427) is active in the NPPES registry as of the last update on 2019-07-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.