1. Home
  2. Directory
  3. Oklahoma
  4. City
  5. Speech Language Pathologist
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARIAH NICOLE HARTZELL MS, CCC-SLP
NPI 1336665694
Speech-Language Pathologist in Oklahoma City, OK

Active since August 18, 2017
91.18/100
CMS Quality Rating
1900 NW EXPRESSWAY STE 450, OKLAHOMA CITY, OK 73118(405) 254-7869 Get Directions Write a Review

NPPES record last updated: August 31, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Aug 31, 2026, Dec 22, 2020, Aug 18, 2017 (3 updates tracked since 2017).

About Mariah Nicole Hartzell Ms, Ccc-slp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIAH NICOLE HARTZELL MS, CCC-SLP (NPI 1336665694) is an individual speech-language pathologist provider in Oklahoma City, Oklahoma, licensed in Oklahoma (5471) and active in the NPI registry since August 2017.

NPPES Registry Identity

NPI1336665694
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMARIAH NICOLE HARTZELLCredential: MS, CCC-SLP
Location Address1900 NW EXPRESSWAY STE 450Oklahoma City, OK 73118-1849
Mailing Address1900 Nw Expressway Ste 450Oklahoma City, OK 73118-1849 · (405) 254-7869
Phone(405) 254-7869
Sole ProprietorNo
Enumeration DateAugust 18, 2017
Last NPPES UpdateAugust 31, 20263 updates tracked since enumeration
NPPES CertifiedAugust 31, 2026
✔ NPI 1336665694 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpeech-Language PathologistSpeech, Language and Hearing Service Providers
Taxonomy Code235Z00000X
License✔ Licensed in OK · 5471
Definition
The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. Speech-language pathologists address typical and atypical impairments and disorders related to communication and swallowing in the areas of speech sound production, resonance, voice, fluency, language (comprehension and expression), cognition, and feeding and swallowing.
1900 NW EXPRESSWAY STE 450, Oklahoma City, OK 73118
Open in Google Maps ↗

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.18/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality79.27
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ELAINE DEMKE LLC
Marriage & Family Therapist
1900 NW EXPRESSWAY STE 450
OKLAHOMA CITY, OK 73118
Oklahoma County (405) 604-7982
MRS. ELAINE LUPE DEMKE M.S., LMFT
Marriage & Family Therapist
1900 NW EXPRESSWAY STE 450
OKLAHOMA CITY, OK 73118
Oklahoma County (405) 604-7982

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mariah Hartzell's NPI number?

The NPI number for Mariah Hartzell is 1336665694. It was assigned to this individual provider in the NPPES registry on August 18, 2017.

Where is Mariah Hartzell located?

Mariah Hartzell practices at 1900 NW Expressway Ste 450, Oklahoma City, OK 73118. The listed phone number is (405) 254-7869.

What is Mariah Hartzell's specialty?

The primary specialty registered for this NPI is Speech-Language Pathologist with taxonomy code 235Z00000X.

When was this NPI record last updated?

The NPPES record for Mariah Hartzell was last updated on August 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.