GREGORY JAMES WALKER APRN, PMHNP-BC
NPI 1972109684
Nurse Practitioner - Psychiatric/Mental Health in Austin, TX

Q: What is Gregory Walker's NPI number?

The NPI number for Gregory Walker is 1972109684. It was assigned to this individual provider in the NPPES registry on December 8, 2020.

Q: What is Gregory Walker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Walker was last updated on December 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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 December 08, 2020PECOS EnrolledAccepts Medicare Assignment

97.58/100

CMS Quality Rating

3501 MILLS AVE, AUSTIN, TX 78731(512) 324-2020 Get Directions Write a Review

NPPES record last updated: December 7, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Dec 7, 2021, Dec 8, 2020 (2 updates tracked since 2020).

On this page

About Gregory James Walker Aprn, Pmhnp-bc NPPES

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

GREGORY JAMES WALKER APRN, PMHNP-BC (NPI 1972109684) is an individual psychiatric/mental health provider in Austin, Texas, licensed in Texas (1017007) and active in the NPI registry since December 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1972109684

Entity TypeIndividualMale

Primary Taxonomy363LP0808X

Provider Legal NameGREGORY JAMES WALKERCredential: APRN, PMHNP-BC

Location Address3501 MILLS AVEAustin, TX 78731-6309

Mailing Address3501 Mills AveAustin, TX 78731-6309 · (512) 324-2020

Phone(512) 324-2020

Sole ProprietorNo

Medical School CMSOtherGraduated 2020

Enumeration DateDecember 8, 2020

Last NPPES UpdateDecember 7, 20212 updates tracked since enumeration

NPPES CertifiedDecember 7, 2021

✔ NPI 1972109684 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363LP0808X

Licenses✔ Licensed in TX · 1017007✔ Licensed in CO · C-APN.0003311-C-NP

Also ListedRegistered Nurse · Psychiatric/Mental HealthTaxonomy 163WP0808X · License 903731 (TX)

3501 MILLS AVE, Austin, TX 78731

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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

Gregory James Walker Aprn, Pmhnp-bc 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 ID8325430549

PECOS Enrollment IDI20220120002596

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 4

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

37 services12 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

21 services11 patients

Psychiatric diagnostic evaluation with medical services 90792

A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.

11 services11 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78731 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

$89.03 typical visit price

range $57.88 – $174.00

Typical copayment $22.25 (range $14.47 – $43.50)

Most-billed visit code 99203

Established Patient

$101.65 typical visit price

range $18.88 – $142.23

Typical copayment $25.41 (range $4.72 – $35.55)

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.

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.

97.58/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

86.53

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 20

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

TERRY LYNN GREEN-WITTY RPH, BCPP

Pharmacist (Psychiatric)

3501 MILLS AVE
AUSTIN, TX 78731

Travis County (512) 324-2027

CHRISTINE DOZIER M.D.

Student in an Organized Health Care Education/Training Program

3501 MILLS AVE, UT AUSTIN DELL MEDICAL SCHOOL - PSYCHIATRY PROGRAMS
AUSTIN, TX 78731

Travis County (512) 324-2036

DR. ROGER LOWELL MCROBERTS III MD

Psychiatry & Neurology (Psychosomatic Medicine)

3501 MILLS AVE, SETON SHOAL CREEK HOSPITAL
AUSTIN, TX 78731

Travis County (512) 324-2080

TZVI PROCHNIK LCSW

Social Worker (Clinical)

3501 MILLS AVE
AUSTIN, TX 78731

Travis County (512) 324-2000

DR. SMITHA MURTHY M.D.

Psychiatry & Neurology (Psychiatry)

3501 MILLS AVE, AMEP-SETON SHOAL CREEK HOSPITAL
AUSTIN, TX 78731

Travis County (512) 324-2080

DR. ALBA EUNICE LARA M.D.

Psychiatry & Neurology (Psychiatry)

3501 MILLS AVE, UT AUSTIN DELL MEDICAL SCHOOL PSYCHIATRY
AUSTIN, TX 78731

Travis County (512) 324-2036

INNA SOLODKY MD

Family Medicine

3501 MILLS AVE
AUSTIN, TX 78731

Travis County (512) 324-4083

DR. JOSEPH L KUGLER M.D.

Psychiatry & Neurology (Psychiatry)

3501 MILLS AVE
AUSTIN, TX 78731

Travis County (512) 805-1810

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 Gregory Walker's NPI number?

The NPI number for Gregory Walker is 1972109684. It was assigned to this individual provider in the NPPES registry on December 8, 2020.

Where is Gregory Walker located?

Gregory Walker practices at 3501 Mills Ave, Austin, TX 78731. The listed phone number is (512) 324-2020.

What is Gregory Walker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Gregory Walker enrolled in Medicare?

Yes. Gregory Walker 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.

When was this NPI record last updated?

The NPPES record for Gregory Walker was last updated on December 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.