Jonathan Webster, M.D.
NPI 1366731549 · Medical Oncology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Webster, M.D. is a Medical Oncology Physician provider in Baltimore, MD (NPI 1366731549).
Provider details
- NPI number
- 1366731549
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D78073 (MD)
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
15 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
524 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 164 | $121 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 119 | $147 |
| 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 | 111 | $17 |
| Bone Marrow, Smear Interpretation85097 | 27 | $48 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 27 | $99 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Dasatinibbrand: Sprycel | 43 | — |
| Valacyclovir Hclbrand: Valacyclovir | 35 | 11 |
| Venetoclaxbrand: Venclexta | 33 | — |
| Ivosidenibbrand: Tibsovo | 29 | — |
| Posaconazole | 21 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 14 | — |
| Amlodipine Besylate | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$7,705 across 11 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
- 2011-03-29
- Last updated
- 2017-06-14
Frequently asked questions
- What is Jonathan Webster's NPI number?
- Jonathan Webster's National Provider Identifier (NPI) is 1366731549, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Webster's specialty?
- Jonathan Webster is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Webster located?
- Jonathan Webster's practice location on file with NPPES is 601 N Caroline St, Baltimore, MD 21287-0005.
- What is Jonathan Webster's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Webster is (410) 955-2834.
- Does Jonathan Webster accept Medicare?
- Jonathan Webster is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Webster's NPI active?
- Yes — Jonathan Webster's NPI (1366731549) is active in the NPPES registry as of the last update on 2017-06-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.