William Jackson, MD
NPI 1255890208 · Pulmonary Disease Physician · Glen Burnie, MD
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Jackson, MD is a Pulmonary Disease Physician provider in Glen Burnie, MD (NPI 1255890208).
Provider details
- NPI number
- 1255890208
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D0103633 (MD)
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 tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 13 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 12 |
| Dupilumabbrand: Dupixent Pen | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 20 York StNew Haven, CT 06510-3220Phone: (203) 688-4242
Registry dates
- Enumerated
- 2019-03-19
- Last updated
- 2025-06-23
- Certified
- 2025-06-23
Frequently asked questions
- What is William Jackson's NPI number?
- William Jackson's National Provider Identifier (NPI) is 1255890208, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Jackson's specialty?
- William Jackson is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Jackson located?
- William Jackson's practice location on file with NPPES is 301 Hospital Dr, Glen Burnie, MD 21061-5803.
- What is William Jackson's phone number?
- The practice phone number listed in the NPPES registry for William Jackson is (410) 787-4000.
- Does William Jackson accept Medicare?
- William Jackson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Jackson's NPI active?
- Yes — William Jackson's NPI (1255890208) is active in the NPPES registry as of the last update on 2025-06-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.