Kathryn Bollin, M.D.
NPI 1801020334 · Hematology & Oncology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Bollin, M.D. is a Hematology & Oncology Physician provider in San Diego, CA (NPI 1801020334).
Provider details
- NPI number
- 1801020334
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A131480 (CA)
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 tenure25% of score
17 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
2,596 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 | 876 | $136 |
| 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 | 855 | $17 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 210 | $148 |
| Injection of Additional New Drug Or Substance Into Vein96375 | 123 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 116 | $97 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 72 | 16 |
| Prednisone | 35 | 17 |
| Gabapentin | 27 | 14 |
| Potassium Chloride | 26 | — |
| Alprazolam | 21 | 11 |
| Anastrozole | 18 | — |
| Ondansetron Hcl | 18 | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,527 across 57 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
Registry dates
- Enumerated
- 2009-05-12
- Last updated
- 2020-01-02
- Certified
- 2020-01-02
Frequently asked questions
- What is Kathryn Bollin's NPI number?
- Kathryn Bollin's National Provider Identifier (NPI) is 1801020334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Bollin's specialty?
- Kathryn Bollin is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Bollin located?
- Kathryn Bollin's practice location on file with NPPES is 501 Washington St Ste 508, San Diego, CA 92103-2238.
- What is Kathryn Bollin's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Bollin is (619) 849-4469.
- Does Kathryn Bollin accept Medicare?
- Kathryn Bollin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Bollin's NPI active?
- Yes — Kathryn Bollin's NPI (1801020334) is active in the NPPES registry as of the last update on 2020-01-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.