DR. LIAM GERHARDT CLARK MD
NPI 1871090837
Psychiatry & Neurology - Neurology in Cheyenne, WY

Q: What is Liam Clark's NPI number?

The NPI number for Liam Clark is 1871090837. It was assigned to this individual provider in the NPPES registry on April 6, 2018. The provider is also known as Lydia Genevieve Clark.

Q: What is Liam Clark's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Q: When was this NPI record last updated?

The NPPES record for Liam Clark was last updated on January 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.

Active since April 06, 2018PECOS EnrolledAccepts Medicare Assignment

2301 HOUSE AVE STE 201, CHEYENNE, WY 82001(307) 638-7757 Get Directions Write a Review

NPPES record last updated: January 20, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jan 20, 2026, Aug 18, 2020, Sep 13, 2019 (3 updates tracked since 2019).

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About Dr. Liam Gerhardt Clark Md NPPES

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

DR. LIAM GERHARDT CLARK MD (NPI 1871090837) is an individual neurology provider in Cheyenne, Wyoming, licensed in Wyoming (15685A) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS, is affiliated with Cheyenne Regional Medical Center, and is a graduate of University Of Washington School Of Medicine (2018).

NPPES Registry Identity

NPI1871090837

Entity TypeIndividualMale

Primary Taxonomy2084N0400X

Provider Legal NameDR. LIAM GERHARDT CLARKCredential: MD

Location Address2301 HOUSE AVE STE 201Cheyenne, WY 82001-3177

Mailing AddressPo Box 20970Cheyenne, WY 82003-7020 · (307) 638-7757 · Fax (307) 638-8359

Phone(307) 638-7757

Sole ProprietorNo

Medical School CMSUniversity Of Washington School Of MedicineGraduated 2018

Enumeration DateApril 6, 2018

Last NPPES UpdateJanuary 20, 20263 updates tracked since enumeration

NPPES CertifiedJanuary 20, 2026

✔ NPI 1871090837 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians

Taxonomy Code2084N0400X

Licenses✔ Licensed in WY · 15685A✔ Licensed in UT · 11441506-1205

Definition

A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.

2301 HOUSE AVE STE 201, Cheyenne, WY 82001

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Other Names 1

Former Name (1)Lydia Genevieve Clark

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Liam Gerhardt Clark Md 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 ID7416380480

PECOS Enrollment IDI20230804002535

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

110 services89 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

109 services86 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

81 services81 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

47 services47 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

43 services37 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

15 services14 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Cheyenne Regional Medical Center

Acute Care Hospitals · Cheyenne, WY

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number530014

Location214 East 23rd StreetCheyenne, WY 82001 · Laramie County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 82001 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$129.37 typical visit price

range $56.42 – $170.72

Typical copayment $32.34 (range $14.10 – $42.68)

Most-billed visit code 99204

Established Patient

$99.46 typical visit price

range $18.19 – $139.32

Typical copayment $24.86 (range $4.54 – $34.83)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

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

PAULA MARIE THORNTON NP

Nurse Practitioner