William Mulroy, M.D.
NPI 1518920636 · Orthopaedic Surgery Physician · Chelsea, MA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mulroy, M.D. is a Orthopaedic Surgery Physician provider in Chelsea, MA (NPI 1518920636).
Provider details
- NPI number
- 1518920636
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 58905 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
43 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 43 | $44 |
Typical Medicare-allowed amounts for these services range $44–$44 (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
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2017-02-07
Frequently asked questions
- What is William Mulroy's NPI number?
- William Mulroy's National Provider Identifier (NPI) is 1518920636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mulroy's specialty?
- William Mulroy is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is William Mulroy located?
- William Mulroy's practice location on file with NPPES is 111 Everett Ave, Chelsea, MA 02150.
- What is William Mulroy's phone number?
- The practice phone number listed in the NPPES registry for William Mulroy is (781) 235-3992.
- Does William Mulroy accept Medicare?
- William Mulroy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mulroy's NPI active?
- Yes — William Mulroy's NPI (1518920636) is active in the NPPES registry as of the last update on 2017-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.