Mary Dawn Co, M.D.
NPI 1427030493 · Infectious Disease Physician · Worcester, MA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Dawn Co, M.D. is a Infectious Disease Physician provider in Worcester, MA (NPI 1427030493).
Provider details
- NPI number
- 1427030493
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 206858 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
18 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 18 | $129 |
Typical Medicare-allowed amounts for these services range $129–$129 (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
Additional practice locations (1)
- 55 Lake Ave NWorcester, MA 01655-0002Phone: (774) 441-8230
Registry dates
- Enumerated
- 2005-11-16
- Last updated
- 2025-04-01
- Certified
- 2025-04-01
Frequently asked questions
- What is Mary Dawn Co's NPI number?
- Mary Dawn Co's National Provider Identifier (NPI) is 1427030493, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Dawn Co's specialty?
- Mary Dawn Co is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Dawn Co located?
- Mary Dawn Co's practice location on file with NPPES is 119 Belmont St, Worcester, MA 01605-2903.
- What is Mary Dawn Co's phone number?
- The practice phone number listed in the NPPES registry for Mary Dawn Co is (774) 441-8230.
- Does Mary Dawn Co accept Medicare?
- Mary Dawn Co is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Dawn Co's NPI active?
- Yes — Mary Dawn Co's NPI (1427030493) is active in the NPPES registry as of the last update on 2025-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.