Erin Chamberlain, M.D.
NPI 1902249469 · Hematology & Oncology Physician · San Luis Obispo, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin Chamberlain, M.D. is a Hematology & Oncology Physician provider in San Luis Obispo, CA (NPI 1902249469).
Provider details
- NPI number
- 1902249469
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A142151 (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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
5,625 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 | 798 | $133 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 714 | $17 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 672 | $17 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 570 | $141 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 417 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Letrozole | 69 | 22 |
| Tamoxifen Citrate | 49 | 17 |
| Anastrozole | 46 | 15 |
| Ondansetron Hcl | 43 | 32 |
| Prednisone | 35 | 16 |
| Prochlorperazine Maleate | 30 | 27 |
| Apixabanbrand: Eliquis | 27 | — |
| Hydrocodone/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$100 across 5 records (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
Additional practice locations (2)
- 10666 N Torrey Pines RdLa Jolla, CA 92037-1027Phone: (858) 553-9100
- 10666 N Torrey Pines RdLa Jolla, CA 92037-1027Phone: (858) 553-9100
Registry dates
- Enumerated
- 2013-04-15
- Last updated
- 2023-03-07
- Certified
- 2020-11-02
Frequently asked questions
- What is Erin Chamberlain's NPI number?
- Erin Chamberlain's National Provider Identifier (NPI) is 1902249469, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin Chamberlain's specialty?
- Erin Chamberlain is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Erin Chamberlain located?
- Erin Chamberlain's practice location on file with NPPES is 892 Aerovista Pl Ste 240, San Luis Obispo, CA 93401-8054.
- What is Erin Chamberlain's phone number?
- The practice phone number listed in the NPPES registry for Erin Chamberlain is (805) 543-8252.
- Does Erin Chamberlain accept Medicare?
- Erin Chamberlain is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin Chamberlain's NPI active?
- Yes — Erin Chamberlain's NPI (1902249469) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.