NPPES file of Aug 9, 2026

Riley Guest

Physician Assistant · Detroit, MI

Riley Guest is a physician assistant with a practice address in Detroit, Michigan, and NPI 1033885256, issued on Aug 18, 2021. Check the license with the Michigan board that licenses this profession; 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
1033885256
Name
Riley Guest
Primary taxonomy
Physician Assistant 363A00000X
Practice location
4777 E Outer Dr, Detroit, MI 48234
Phone
(313) 369-9100
Enumerated
Aug 18, 2021
Record last updated
Aug 18, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20230811000220); accepts Medicare assignment
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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Also registered at 4777 E Outer Dr

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

  1. Rena Austin, MA, LLPC, CAAC,Counselor1720187677
  2. Craig Bailey, M.D.Internal Medicine Physician1619106119
  3. Steven Candela, LMSWSocial Worker1417042615
  4. Lawrence Casteel, LLBSWCounselor1083765101
  5. Nanette Colling, LMSWSocial Worker1649371774
  6. Kimberly Culbreath, MSW, LLMSWSocial Worker1043408636

Verify Riley Guest in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Michigan board licenses this professionCheck 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
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32% fewer Medicare Part D claims than the average physician assistant in 2024

563 Medicare Part D claims for 214 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.

  1. Riley Guest563
  2. Specialty average830

Most prescribed

  1. Tamsulosin Hcl78 claims
  2. Ciprofloxacin Hcl51 claims
  3. Solifenacin Succinate36 claims
  4. Methenamine Hippurate33 claims
  5. Testosterone Cypionate26 claims
  6. Oxybutynin Chloride Er25 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.

Industry payments in 2024: $608.38

15 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Riley Guest$608.38
  2. Specialty average$841.65

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 2 group practices

  1. Central Ohio Urology Group, LLC.Gahanna, OH
  2. Hocking Valley Medical Group, Inc.Logan, OH

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

Riley Guest among 6,989 physician assistant records in Michigan

Riley Guest is one of 6,989 physician assistant records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 71% of them.

  • NPI issued2021 · 71% of these records are older, 24% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 68% of these records are
  • Graduated2021 · median 2017 among the 4,739 with a school on file
  • Record last updated2021 · 40% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

368 physician assistant records list a practice address in Detroit

They are 368 of the 19,832 NPPES records with a practice address in Detroit, and 6,989 physician assistant records in Michigan.

The 8 physician assistant records with the nearest ZIP codes

  1. Mackenzie Jacks, PA-CDetroit, MI 482341285054254
  2. Karen Martens, PADetroit, MI 482341326016015
  3. Jacquelin WhiteDetroit, MI 482341750247318
  4. Tyler Wiggins, PA-CDetroit, MI 482341922690304
  5. Maria Calagna, PACDetroit, MI 482351801849757
  6. Elzbieta Dempsey, PACDetroit, MI 482351609829811
  7. Deodge Hill, PACDetroit, MI 482351174560106
  8. Melissa Keller, PA-CDetroit, MI 482351326014218

Common questions

What is Riley Guest's NPI number?

Riley Guest's National Provider Identifier (NPI) is 1033885256, issued on Aug 18, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Riley Guest located?

The NPPES record lists a practice address at 4777 E Outer Dr, Detroit, MI, 48234. Phone: (313) 369-9100. Providers update this record themselves, so call before visiting.

How can I verify Riley Guest's license?

Search the Michigan board that licenses this profession; the NPPES record confirms identity only.

How much does Riley Guest prescribe under Medicare Part D?

In 2024, Riley Guest had 563 Medicare Part D claims for 214 beneficiaries; the average among physician assistant prescribers was 830. 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.

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.