Dan Ryan
NPI 1659750255 · Certified Registered Nurse Anesthetist · Boston, MA
Enrolled with Medicare as Practitioner - Certified Registered Nurse Anesthetist (crna) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dan Ryan is a Certified Registered Nurse Anesthetist provider in Boston, MA (NPI 1659750255).
Provider details
- NPI number
- 1659750255
- Entity type
- Individual
- Primary specialty
- Certified Registered Nurse AnesthetistPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- No
- License
- RN2265374 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 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
47 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) |
|---|---|---|
| Anesthesia for Procedure on Heart and Large Blood Vessels00560 | 19 | $265 |
| Anesthesia for Exam of Colon Using an Endoscope00812 | 15 | $57 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 13 | $90 |
Typical Medicare-allowed amounts for these services range $57–$265 (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
- 2015-05-28
- Last updated
- 2024-07-08
- Certified
- 2024-07-08
Frequently asked questions
- What is Dan Ryan's NPI number?
- Dan Ryan's National Provider Identifier (NPI) is 1659750255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dan Ryan's specialty?
- Dan Ryan is listed in the NPPES registry with a primary specialty of Certified Registered Nurse Anesthetist (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Dan Ryan located?
- Dan Ryan's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Dan Ryan's phone number?
- The practice phone number listed in the NPPES registry for Dan Ryan is (617) 636-5000.
- Does Dan Ryan accept Medicare?
- Dan Ryan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dan Ryan's NPI active?
- Yes — Dan Ryan's NPI (1659750255) is active in the NPPES registry as of the last update on 2024-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.