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MR. MARK W WALTER M.D
NPI 1205910643
Psychiatry & Neurology - Psychiatry in Dubuque, IA

Active since October 24, 2006PECOS Enrolled
100/100
CMS Quality Rating
1690 ELM ST STE 300, DUBUQUE, IA 52001(563) 690-2850(563) 582-5335 Get Directions Write a Review

NPPES record last updated: January 23, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 7, 2023, Oct 18, 2023, Oct 14, 2020 and 1 more (4 updates tracked since 2018).

About Mr. Mark W Walter M.d NPPES

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

MR. MARK W WALTER M.D (NPI 1205910643) is an individual psychiatry provider in Dubuque, Iowa, licensed in Wyoming (7585A) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Gillette, and is a graduate of Wake Forest University School Of Medicine (2002).

NPPES Registry Identity

NPI1205910643
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameMR. MARK W WALTERCredential: M.D
Location Address1690 ELM ST STE 300Dubuque, IA 52001-3679
Mailing AddressPo Box 3011Gillette, WY 82717-3011 · (307) 688-5000 · Fax (307) 688-5074
Phone(563) 690-2850
Fax(563) 582-5335
Sole ProprietorNo
Medical School CMSWake Forest University School Of MedicineGraduated 2002
Enumeration DateOctober 24, 2006
Last NPPES UpdateJanuary 23, 20254 updates tracked since enumeration
NPPES CertifiedJanuary 23, 2025
✔ NPI 1205910643 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in WY · 7585A✔ Licensed in IA · MD-48932✔ Licensed in MN · 72459
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.
1690 ELM ST STE 300, Dubuque, IA 52001
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Secondary Practice Location 1

Location 1501 S Burma AveGillette, WY 82716-3426 · Phone (307) 688-5000 · Fax (307) 688-5074

Other Identifiers 3

OtherMD-48932IA · State Medical License
Other72459MN · State Medical License
Other7585AWY · State Medical License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of North Dakota, Blue Cross Blue Shield of Wyoming, CareSource (Common Ground Healthcare) and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. Mark W Walter M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6103858477
PECOS Enrollment IDI20231107001579
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.

Medicare Billing Reassignments

5

Medicare enrollment records show Mark Walter reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Watertown Physician Practices LLC
110 mi
Family Medicine
1507 DOCTORS CT
Watertown, WI 53094
  • Reassigned Medicare billing, Wisconsin enrollment
  • 215 clinicians in this Medicare group
NPI 1770964363 (920) 261-4111
Evizzit Of Iowa Psychiatry PC
171 mi
Adult Mental Health
1501 42ND ST STE 120
West Des Moines, IA 50266
  • Reassigned Medicare billing, Iowa and Montana enrollments
  • Also billed through NPI 1740841188 (Montana)
  • 61 clinicians in this Medicare group
NPI 1679233183 (855) 270-3625
Mille Lacs Health System
287 mi
Critical Access
200 ELM ST N
Onamia, MN 56359
  • Reassigned Medicare billing, Minnesota enrollment
  • 145 clinicians in this Medicare group
NPI 1548212699 (320) 532-3154
Campbell County Hospital District
714 mi
Family Medicine
131 RED DEVIL DRIVE
Hulett, WY 82720
  • Reassigned Medicare billing, Wyoming enrollment
  • 285 clinicians in this Medicare group
NPI 1750047031 (307) 688-2235
Wyoming Behavioral Institute
795 mi
Psychiatric Hospital
2521 E 15TH ST
Casper, WY 82609
  • Reassigned Medicare billing, Wyoming enrollment
  • Medicare enrollment name: Uhs Of Wyoming, Inc
  • 34 clinicians in this Medicare group
NPI 1295709822 (307) 237-7444

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52001 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
$161.40 typical visit price
range $52.96 – $161.40
Typical copayment $40.35 (range $13.24 – $40.35)
Most-billed visit code 99205
Established Patient
$66.36 typical visit price
range $16.91 – $131.98
Typical copayment $16.59 (range $4.22 – $32.99)
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.

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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Promoting Interoperability100
Improvement Activities40

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.

DR. SAMANTHA S HUMKE D.D.S.
Dentist
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
CAITLYN BRYANNE HICKS DNP, FNP-BC
Nurse Practitioner (Family)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
ALLISON L SCHWAB LISW
Social Worker (Clinical)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
RACHAEL A. PLOESSL DNP, FNP-BC
Nurse Practitioner (Family)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
MR. BENJAMIN ALLEN SHAW L.I.S.W.
Social Worker (Clinical)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
DR. SHIQI WANG DMD
Dentist (General Practice)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850
DR. GEORGE E ANASTASSOV DDS,MD
Oral & Maxillofacial Surgery
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-0321
MICHELE ANN GANSHIRT A.R.N.P.
Nurse Practitioner (Pediatrics)
1690 ELM ST STE 300
DUBUQUE, IA 52001
Dubuque County (563) 690-2850

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 Walter's NPI number?

The NPI number for Mark Walter is 1205910643. It was assigned to this individual provider in the NPPES registry on October 24, 2006.

Where is Mark Walter located?

Mark Walter practices at 1690 Elm St Ste 300, Dubuque, IA 52001. The listed phone number is (563) 690-2850.

What is Mark Walter's specialty?

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

Is Mark Walter enrolled in Medicare?

Yes. Mark Walter is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Walter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Walter reassigns Medicare benefits to 5 organizations: Watertown Physician Practices LLC (Watertown, WI), Evizzit Of Iowa Psychiatry PC (West Des Moines, IA), Mille Lacs Health System (Onamia, MN), Campbell County Hospital District (Hulett, WY) and Wyoming Behavioral Institute (Casper, WY). 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 Mark Walter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Walter accept?

Health plans from Blue Cross Blue Shield of North Dakota, Blue Cross Blue Shield of Wyoming, CareSource (Common Ground Healthcare), Dean Health Plan and Group Health Cooperative-SCW list Mark Walter 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 Walter was last updated on January 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.