NPPES file of Aug 9, 2026

Nathaniel Ark Chin, M.D.

Geriatric Medicine (Internal Medicine) Physician · Fitchburg, WI

Nathaniel Ark Chin, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Fitchburg, Wisconsin, and NPI 1902114754, issued on Sep 15, 2010. Check the license (Wisconsin 63774, 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 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1902114754
Name
Nathaniel Ark Chin
Credential
M.D.
Primary taxonomy
Geriatric Medicine (Internal Medicine) Physician 207RG0300X
License numbers
63774 WI
63774-20 WI
Self-reported in NPPES; status is on the state search
Practice location
5543 E Cheryl Pkwy, Fitchburg, WI 53711
Phone
(608) 263-7740
Enumerated
Sep 15, 2010
Record last updated
Feb 10, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(608) 262-6048
Medicare enrollment
Enrolled (PECOS I20150804003268); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 2010
Telehealth
Offers telehealth (CMS)
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 geriatric medicine (internal medicine) physician records → All 110 in Wisconsin → Look up another NPI →

Also registered at 5543 E Cheryl Pkwy

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

  1. Leslie Adams, NPNurse Practitioner1053633115
  2. Rebecca Bok, LCSWClinical Social Worker1144865122
  3. Carol Delfosse, LMFTMarriage & Family Therapist1801220157
  4. Alida Evans, MD PHDFamily Medicine Physician1043270341
  5. Lakeisha Feagin, NPNurse Practitioner1588451553
  6. Robert FreidelFamily Medicine Physician1730685835

Verify Nathaniel Ark Chin in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWisconsin Medical Examining Board
    Search for license 63774    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

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91% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024

365 Medicare Part D claims for 104 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims.

  1. Nathaniel Chin365
  2. Specialty average4,246

Most prescribed

  1. Donepezil Hcl202 claims
  2. Escitalopram Oxalate39 claims
  3. Rivastigmine37 claims
  4. Memantine Hcl26 claims
  5. Duloxetine Hcl13 claims
  6. Sertraline Hcl13 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. University OF Wisconsin Medical Foundation IncFitchburg, WI

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

Nathaniel Ark Chin among 110 geriatric medicine (internal medicine) physician records in Wisconsin

Nathaniel Ark Chin, M.D. is one of 110 geriatric medicine (internal medicine) physician records with a practice address in Wisconsin. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.

  • NPI issued2010 · 67% of these records are older, 30% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileYes · 50% of these records are
  • Graduated2010 · median 2006 among the 55 with a school on file
  • Record last updated2021 · 47% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Geriatric Medicine (Internal Medicine) Physician providers in Wisconsin

There are 110 geriatric medicine (internal medicine) physician records in Wisconsin.

All 110 in Wisconsin → Every provider in Fitchburg → Geriatric Medicine (Internal Medicine) Physician nationwide →

The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes

  1. William Hisgen, M.D.Madison, WI 537111952554966
  2. Daniel McCulley, MDFitchburg, WI 537111114313434
  3. Kathleen Walsh, DOMadison, WI 537111427122894
  4. Amy Daley, MDMadison, WI 537151952348278
  5. Sophie Kramer, MDMadison, WI 537151457307449
  6. Marjorie Dimaggio, MDMadison, WI 537161164476388
  7. Elizabeth Chapman, MDMadison, WI 537051225293251
  8. Alexis Eastman, M.D.Madison, WI 537051306164306

Common questions

What is Nathaniel Ark Chin, M.D.'s NPI number?

Nathaniel Ark Chin, M.D.'s National Provider Identifier (NPI) is 1902114754, issued on Sep 15, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Nathaniel Ark Chin, M.D. located?

The NPPES record lists a practice address at 5543 E Cheryl Pkwy, Fitchburg, WI, 53711. Phone: (608) 263-7740. Providers update this record themselves, so call before visiting.

How can I verify Nathaniel Ark Chin, M.D.'s license?

NPPES lists Wisconsin license number 63774, 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.

How much does Nathaniel Ark Chin, M.D. prescribe under Medicare Part D?

In 2024, Nathaniel Ark Chin, M.D. had 365 Medicare Part D claims for 104 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. Part D covers Medicare prescriptions only.

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.