NPPES file of Aug 9, 2026

Ryan Joseph Longfellow, MD

Anesthesiology Physician · Madison, WI

Ryan Joseph Longfellow, MD is an anesthesiology physician with a practice address in Madison, Wisconsin, and NPI 1356768683, issued on Mar 25, 2014. Check the license (Wisconsin 81042, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1356768683
Name
Ryan Joseph Longfellow
Credential
MD
Primary taxonomy
Anesthesiology Physician 207L00000X
License numbers
81042 WI
143984 AK
01086496A IN
Self-reported in NPPES; status is on the state search
Practice location
600 Highland Ave, Madison, WI 53792
Phone
(608) 263-8100
Enumerated
Mar 25, 2014
Record last updated
May 27, 2025
Fax
(608) 262-6247
Medicare enrollment
Enrolled (PECOS I20221102002992); accepts Medicare assignment
Medical or professional school
Indiana University School Of Medicine, 2014
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest anesthesiology physician records → All 1,313 in Wisconsin → Look up another NPI →

Also registered at 600 Highland Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michael AabergSurgery Physician1346991064
  2. Carrah Aadrik, CRNACertified Registered Nurse Anesthetist1326423286
  3. Daniel Abbott, MDSurgical Oncology Physician1750412615
  4. Alaa Abd-ElsayedPain Medicine Physician1194967703
  5. Safiyya Abdulkadir, MDRheumatology Physician1093455826
  6. Edwin Abel, M.D.Urology Physician1083800510

Verify Ryan Joseph Longfellow in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 81042    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Wisconsin license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. University OF Wisconsin Medical Foundation IncMadison, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Ryan Joseph Longfellow among 1,313 anesthesiology physician records in Wisconsin

Ryan Joseph Longfellow, MD is one of 1,313 anesthesiology physician records with a practice address in Wisconsin. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.

  • NPI issued2014 · 74% of these records are older, 23% newer
  • In a Medicare fileYes · 72% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2014 · median 2006 among the 872 with a school on file
  • Record last updated2025 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

280 anesthesiology physician records list a practice address in Madison

They are 280 of the 15,014 NPPES records with a practice address in Madison, and 1,313 anesthesiology physician records in Wisconsin.

All 1,313 in Wisconsin → Every provider in Madison → Anesthesiology Physician nationwide →

The 8 anesthesiology physician records with the nearest ZIP codes

  1. Heather Abernethy, MDMadison, WI 537921104826288
  2. Srinivas Bollimpalli, MDMadison, WI 537921205806940
  3. James Fitzpatrick, MDMadison, WI 537921013983527
  4. Frederick Heiden, DOMadison, WI 537921982603957
  5. Jonathan Kay, M.D.Madison, WI 537921477537702
  6. Howard Lau, M.D.Madison, WI 537921053304915
  7. Dawn Ledbetter, MDMadison, WI 537921750381323
  8. Kathryn Ann McQueen, MDMadison, WI 537921972574168

Common questions

What is Ryan Joseph Longfellow, MD's NPI number?

Ryan Joseph Longfellow, MD's National Provider Identifier (NPI) is 1356768683, issued on Mar 25, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Ryan Joseph Longfellow, MD located?

The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 263-8100. Providers update this record themselves, so call before visiting.

How can I verify Ryan Joseph Longfellow, MD's license?

NPPES lists Wisconsin license number 81042, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.