Ryan Longfellow, MD
NPI 1356768683 · Anesthesiology Physician · Madison, WI
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Longfellow, MD is a Anesthesiology Physician provider in Madison, WI (NPI 1356768683).
Provider details
- NPI number
- 1356768683
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01086496A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
87 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 | 32 | $75 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 24 | $92 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 18 | $118 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 | $61 |
Typical Medicare-allowed amounts for these services range $61–$118 (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 (2)
- 10525 W 124th AveCedar Lake, IN 46303-9275Phone: (219) 805-1484
- 5165 Mccarty LnLafayette, IN 47905-8764Phone: (765) 448-8000Fax: (765) 446-4695
Registry dates
- Enumerated
- 2014-03-25
- Last updated
- 2025-05-27
- Certified
- 2025-05-27
Frequently asked questions
- What is Ryan Longfellow's NPI number?
- Ryan Longfellow's National Provider Identifier (NPI) is 1356768683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Longfellow's specialty?
- Ryan Longfellow is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Longfellow located?
- Ryan Longfellow's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-1902.
- What is Ryan Longfellow's phone number?
- The practice phone number listed in the NPPES registry for Ryan Longfellow is (608) 263-8100.
- Does Ryan Longfellow accept Medicare?
- Ryan Longfellow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Longfellow's NPI active?
- Yes — Ryan Longfellow's NPI (1356768683) is active in the NPPES registry as of the last update on 2025-05-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.