Marah J. Greff, MS CF SLP
Speech-Language Pathologist · Williston, ND
Marah J. Greff, MS CF SLP is a speech-language pathologist with a practice address in Williston, North Dakota, and NPI 1972163632, issued on Jun 15, 2019. Check the license (North Dakota 1733, as entered in NPPES) with the North Dakota board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Marah J. Greff
- Credential
- MS CF SLP
- Primary taxonomy
- Speech-Language Pathologist 235Z00000X
- License number
- 1733 ND
Self-reported in NPPES; status is on the state search - Practice location
- 221 University Ave Ste 203, Williston, ND 58801
- Phone
- (701) 580-8788
- Enumerated
- Jun 15, 2019
- Record last updated
- Jun 15, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (701) 609-5231
- Entity
- Type 1 · individual
Also registered at 221 University Ave Ste 203
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abbey Aide, M.S. CF-SLPSpeech-Language Pathologist1346987385
- Erin Cooper, MS SLPSpeech-Language Pathologist1851264329
- Jordan Harstad, LAPCProfessional Counselor1962376285
- Mariah Herring, OTD, OTR/LOccupational Therapist1790654770
- Jenna Johnston, M.S. SLPSpeech-Language Pathologist1144104555
- Hannah Krebs, M.S. CCC-SLPSpeech-Language Pathologist1659863090
Verify Marah J. Greff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich North Dakota board licenses this profession
Search for license 1733Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40 speech-language pathologist records list a practice address in Williston
They are 40 of the 611 NPPES records with a practice address in Williston, and 1,009 speech-language pathologist records in North Dakota. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 40 in Williston → All 1,009 in North Dakota → Every provider in Williston →
Other speech-language pathologist records in North Dakota
- Diane Aandal, MS/CCC-SLPGrand Forks, ND1184282774
- Alyssa Aanderud, M.S., CCC-SLPGrand Forks, ND1346847050
- Abby Abel, M.S., SLPMinot, ND1730920273
- Jessica Aberth, MSP, CCC-SLPGrand Forks, ND1730762600
- Eva Abfalter, MS, SLPBismarck, ND1811780471
- Meghan AckermanDickinson, ND1346039740
- Alexie AdairLisbon, ND1588034094
- Catherine AdamsGrand Forks, ND1720303928
- Abbey Aide, M.S. CF-SLPWilliston, ND1346987385
- Ann AlbrechtJamestown, ND1962536599
Common questions
What is Marah J. Greff, MS CF SLP's NPI number?
Marah J. Greff, MS CF SLP's National Provider Identifier (NPI) is 1972163632, issued on Jun 15, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marah J. Greff, MS CF SLP located?
The NPPES record lists a practice address at 221 University Ave Ste 203, Williston, ND, 58801. Phone: (701) 580-8788. Providers update this record themselves, so call before visiting.
How can I verify Marah J. Greff, MS CF SLP's license?
NPPES lists North Dakota license number 1733, as entered by the provider. Search the North Dakota board that licenses this profession; the NPPES record confirms identity 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. 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.