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DR. MARK C. WALKER I M.D
NPI 1427318864
Psychiatry & Neurology - Psychiatry in Palm Beach, FL

Active since May 19, 2012PECOS EnrolledAccepts Medicare Assignment
234 OLEANDER AVE APT 6, PALM BEACH, FL 33480(352) 497-5920(561) 629-5240 Get Directions Write a Review

NPPES record last updated: June 21, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 21, 2025, May 17, 2025, Nov 5, 2019 (3 updates tracked since 2019).

About Dr. Mark C. Walker I M.d NPPES

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

DR. MARK C. WALKER I M.D (NPI 1427318864) is an individual psychiatry provider in Palm Beach, Florida, licensed in Florida (ME108732) and active in the NPI registry since May 2012. He is enrolled in Medicare PECOS and is a graduate of Other (1990).

NPPES Registry Identity

NPI1427318864
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. MARK C. WALKER ICredential: M.D
Location Address234 OLEANDER AVE APT 6Palm Beach, FL 33480-3824
Mailing Address234 Oleander Ave Apt 6Palm Beach, FL 33480-3824 · (352) 497-5920 · Fax (561) 629-5240
Phone(352) 497-5920
Fax(561) 629-5240
Sole ProprietorYes
Medical School CMSOtherGraduated 1990
Enumeration DateMay 19, 2012
Last NPPES UpdateJune 21, 20253 updates tracked since enumeration
NPPES CertifiedJune 21, 2025
✔ NPI 1427318864 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in FL · ME108732
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
234 OLEANDER AVE APT 6, Palm Beach, FL 33480
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Other Identifiers 1

Medicaid100556600FL

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida, UnitedHealthcare.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. Mark C. Walker I M.d 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 ID8729224878
PECOS Enrollment IDI20130417000131
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33480 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
$179.05 typical visit price
range $58.56 – $179.05
Typical copayment $44.76 (range $14.64 – $44.76)
Most-billed visit code 99205
Established Patient
$73.00 typical visit price
range $18.44 – $144.68
Typical copayment $18.25 (range $4.61 – $36.17)
Most-billed visit code 99213
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

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

MCW PSYCH CARE MD, LLC
Psychiatry & Neurology (Psychiatry)
234 OLEANDER AVE APT 6
PALM BEACH, FL 33480
Palm Beach County (352) 497-5920

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 Mark Walker's NPI number?

The NPI number for Mark Walker is 1427318864. It was assigned to this individual provider in the NPPES registry on May 19, 2012.

Where is Mark Walker located?

Mark Walker practices at 234 Oleander Ave Apt 6, Palm Beach, FL 33480. The listed phone number is (352) 497-5920.

What is Mark Walker's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mark Walker enrolled in Medicare?

Yes. Mark 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.

What insurance does Mark Walker accept?

Health plans from Oscar Health Maintenance Organization of Florida and UnitedHealthcare list Mark Walker 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 Mark Walker was last updated on June 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.