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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MS. ALETHEA MARKS MS-CCC, SLP
NPI 1710634696
Speech-Language Pathologist in Lansing, MI

Active since March 09, 2022Accepts Medicare Assignment
137 S MARKETPLACE BLVD, LANSING, MI 48917(517) 336-6060(517) 336-6050 Get Directions Write a Review

NPPES record last updated: October 16, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 16, 2026, Mar 9, 2022 (2 updates tracked since 2022).

About Ms. Alethea Marks Ms-ccc, Slp NPPES

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

MS. ALETHEA MARKS MS-CCC, SLP (NPI 1710634696) is an individual speech-language pathologist provider in Lansing, Michigan, licensed in Michigan (7101009386) and active in the NPI registry since March 2022. She is a graduate of Other (2018).

NPPES Registry Identity

NPI1710634696
Entity TypeIndividualFemale
Primary Taxonomy235Z00000X
Provider Legal NameMS. ALETHEA MARKSCredential: MS-CCC, SLP
Location Address137 S MARKETPLACE BLVDLansing, MI 48917-7756
Mailing Address420 Allen StLansing, MI 48912-2602
Phone(517) 336-6060
Fax(517) 336-6050
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateMarch 9, 2022
Last NPPES UpdateOctober 16, 20262 updates tracked since enumeration
NPPES CertifiedOctober 16, 2026
✔ NPI 1710634696 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
Licenses✔ Licensed in MI · 7101009386✔ Licensed in VA · 2202010529✔ Licensed in PA · SL015088✔ Licensed in FL · SA17671
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.
137 S MARKETPLACE BLVD, Lansing, MI 48917
Open in Google Maps ↗

Other Names 1

Former Name (1)Alethea Karras

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Molina Healthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ms. Alethea Marks Ms-ccc, Slp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456747120
PECOS Enrollment IDI20220405002274, I20230808001855, I20230809004074

Medicare Billing Reassignments

2

Medicare enrollment records show Alethea Marks reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Expressable Therapy PC
1,118 mi
Speech-Language Pathologist
7600 CHEVY CHASE DR, BLDG 2 SUITE 300
Austin, TX 78752
  • Reassigned Medicare billing, Pennsylvania and Virginia enrollments
  • 40 clinicians in this Medicare group
NPI 1134875370 (512) 377-6318
Expressable Speech-Language Pathology, P.C.
1,121 mi
Speech-Language Pathologist
3800 N LAMAR BLVD STE 200
Austin, TX 78756
  • Reassigned Medicare billing, Florida enrollment
  • Medicare enrollment name: Expressable Speech-Language Pathology PC
  • 113 clinicians in this Medicare group
NPI 1649875857 (512) 377-6318

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 6

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

DR. CALLEY ANNE LONIER DPT
Physical Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060
DR. KACY ANN SULAVIK PT, DPT
Physical Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060
GRACIE ANN LEFLER MSOT, OTRL
Occupational Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060
SARAH MILLER
Occupational Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060
JOSE-SANTIAGO ESTRADA MURRAY PT, DPT
Physical Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060
ASHTON SONET GOODWIN OTRL
Occupational Therapist
137 S MARKETPLACE BLVD
LANSING, MI 48917
Eaton County (517) 336-6060

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 Alethea Marks's NPI number?

The NPI number for Alethea Marks is 1710634696. It was assigned to this individual provider in the NPPES registry on March 9, 2022. The provider is also known as Alethea Karras.

Where is Alethea Marks located?

Alethea Marks practices at 137 S Marketplace Blvd, Lansing, MI 48917. The listed phone number is (517) 336-6060.

What is Alethea Marks's specialty?

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

Is Alethea Marks enrolled in Medicare?

Yes. Alethea Marks is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Alethea Marks's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alethea Marks reassigns Medicare benefits to 2 organizations: Expressable Therapy PC (Austin, TX) and Expressable Speech-Language Pathology, P.C. (Austin, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alethea Marks's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Alethea Marks accept?

Health plans from AmeriHealth Caritas Next and Molina Healthcare list Alethea Marks as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Alethea Marks was last updated on October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.