NPPES file of Aug 9, 2026

Cassandra Oberndorf, DO

Pediatrics Physician · Grand Rapids, MI

Cassandra Oberndorf, DO is a pediatrics physician with a practice address in Grand Rapids, Michigan, and NPI 1396324661, issued on Apr 5, 2021. Check the license (Michigan 5151015005, as entered in NPPES) on the Michigan Board of Medicine (LARA); 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
1396324661
Name
Cassandra Oberndorf
Credential
DO
Primary taxonomy
Pediatrics Physician 208000000X
License number
5151015005 MI
Self-reported in NPPES; status is on the state search
Practice location
100 Michigan St NE RM 280, Grand Rapids, MI 49503
Phone
(616) 267-0118
Enumerated
Apr 5, 2021
Record last updated
Jul 15, 2024
Medicare enrollment
Enrolled (PECOS I20240606003701); 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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8 nearest pediatrics physician records → All 2,180 in Michigan → Look up another NPI →

Also registered at 100 Michigan St NE RM 280

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

  1. Nicholas Beam, MDPediatrics Physician1336636927
  2. Darya Falamarzi, MDPediatrics Physician1245850346
  3. Baila Harris, MDPediatrics Physician1588185664
  4. Meredith Hickson, MDPediatrics Physician1548753619
  5. Justin Steele, MDPediatrics Physician1225522410
  6. Robert Veenema, DOPediatrics Physician1164471587

Verify Cassandra Oberndorf in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 5151015005    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 Michigan 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. Spectrum Health Primary Care PartnersGrand Rapids, MI

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

Cassandra Oberndorf among 2,180 pediatrics physician records in Michigan

Cassandra Oberndorf, DO is one of 2,180 pediatrics physician records with a practice address in Michigan. 38% 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 87% of them.

  • NPI issued2021 · 87% of these records are older, 10% newer
  • In a Medicare fileYes · 38% of these records are
  • In the CMS Doctors and Clinicians fileYes · 11% of these records are
  • Graduated2021 · median 2011 among the 235 with a school on file
  • Record last updated2024 · 52% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

251 pediatrics physician records list a practice address in Grand Rapids

They are 251 of the 18,005 NPPES records with a practice address in Grand Rapids, and 2,180 pediatrics physician records in Michigan.

All 2,180 in Michigan → Every provider in Grand Rapids → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. Rebecca Bultman, MDGrand Rapids, MI 495031972574309
  2. Timothy Conroy, MDGrand Rapids, MI 495031932189651
  3. Jill Golden, M.D.Grand Rapids, MI 495031396793261
  4. Jeri Kessenich, MDGrand Rapids, MI 495031386624633
  5. Cheryl Kuz, MDGrand Rapids, MI 495031447230107
  6. Michael Metz, MDGrand Rapids, MI 495031083694426
  7. James Moses, MDGrand Rapids, MI 495031912998683
  8. Dominic Sanfilippo, MDGrand Rapids, MI 495031386615763

Common questions

What is Cassandra Oberndorf, DO's NPI number?

Cassandra Oberndorf, DO's National Provider Identifier (NPI) is 1396324661, issued on Apr 5, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Cassandra Oberndorf, DO located?

The NPPES record lists a practice address at 100 Michigan St NE RM 280, Grand Rapids, MI, 49503. Phone: (616) 267-0118. Providers update this record themselves, so call before visiting.

How can I verify Cassandra Oberndorf, DO's license?

NPPES lists Michigan license number 5151015005, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. 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.