Giles Whalen, M.D.
NPI 1538141957 · Surgery Physician · Worcester, MA
Giles Whalen, M.D. is a Surgery Physician provider in Worcester, MA (NPI 1538141957).
Provider details
- NPI number
- 1538141957
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 57085 (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
39 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 14 | $81 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 13 | $131 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 12 | $65 |
Typical Medicare-allowed amounts for these services range $65–$131 (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
- 2005-11-20
- Last updated
- 2024-07-31
- Certified
- 2024-07-31
Frequently asked questions
- What is Giles Whalen's NPI number?
- Giles Whalen's National Provider Identifier (NPI) is 1538141957, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Giles Whalen's specialty?
- Giles Whalen is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Giles Whalen located?
- Giles Whalen's practice location on file with NPPES is 119 Belmont St, Worcester, MA 01605-2903.
- What is Giles Whalen's phone number?
- The practice phone number listed in the NPPES registry for Giles Whalen is (508) 334-5202.
- Is Giles Whalen's NPI active?
- Yes — Giles Whalen's NPI (1538141957) is active in the NPPES registry as of the last update on 2024-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.