Mark W. Walter, M.D
Psychiatry Physician · Dubuque, IA
Mark W. Walter, M.D is a psychiatry physician with a practice address in Dubuque, Iowa, and NPI 1205910643, issued on Oct 24, 2006. Check the license (Iowa MD-48932, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark W. Walter
- Credential
- M.D
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- MD-48932 IA
7585A WY
72459 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1690 Elm St Ste 300, Dubuque, IA 52001
- Phone
- (563) 690-2850
- Enumerated
- Oct 24, 2006
- Record last updated
- Jan 23, 2025
- Fax
- (563) 582-5335
- Medicare enrollment
- Enrolled (PECOS I20231107001579); may accept Medicare assignment
- Medical or professional school
- Wake Forest University School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 398 in Iowa → Look up another NPI →
Also registered at 1690 Elm St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ashley Biedermann, FNPFamily Nurse Practitioner1295211761
- Katie Campbell, PMHNPPsychiatric/Mental Health Nurse Practitioner1275844649
- Jon DeckerMental Health Counselor1881016137
- Michele Ganshirt, A.R.N.P.Pediatric Nurse Practitioner1194704791
- Ali Hamam, AHStudent in an Organized Health Care Education/Training Program1598455404
- Caitlyn Hicks, DNP, FNP-BCFamily Nurse Practitioner1093290165
Verify Mark W. Walter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license MD-48932Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average psychiatry physician in 2024
475 Medicare Part D claims for 58 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Duloxetine Hcl75 claims
- Buspirone Hcl67 claims
- Mirtazapine35 claims
- Bupropion Xl29 claims
- Trintellix29 claims
- Fluoxetine Hcl24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Crescent Community Health CenterDubuque, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark W. Walter among 398 psychiatry physician records in Iowa
Mark W. Walter, M.D is one of 398 psychiatry physician records with a practice address in Iowa. 66% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 60% newer
- In a Medicare fileYes · 66% of these records are
- In the CMS Doctors and Clinicians fileYes · 47% of these records are
- Graduated2002 · median 2010 among the 188 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Iowa
There are 398 psychiatry physician records in Iowa.
All 398 in Iowa → Every provider in Dubuque → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Lee Berman, M.DDubuque, IA 520011508271867
- Thomas Boxleiter, M.D.Dubuque, IA 520011619927431
- Adib Kassas, M.D.Dubuque, IA 520011386694156
- Yasyn Lee, M.D.Dubuque, IA 520011477506632
- Michael Peroski, DODubuque, IA 520011689092454
- Roger Shafer, M.D.Dubuque, IA 520011255391363
- Anupama Upadhyay, M.D.Dubuque, IA 520011467407890
- Timothy Wedeward, ARNPDubuque, IA 520011518976711
Common questions
What is Mark W. Walter, M.D's NPI number?
Mark W. Walter, M.D's National Provider Identifier (NPI) is 1205910643, issued on Oct 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. Walter, M.D located?
The NPPES record lists a practice address at 1690 Elm St Ste 300, Dubuque, IA, 52001. Phone: (563) 690-2850. Providers update this record themselves, so call before visiting.
How can I verify Mark W. Walter, M.D's license?
NPPES lists Iowa license number MD-48932, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark W. Walter, M.D prescribe under Medicare Part D?
In 2024, Mark W. Walter, M.D had 475 Medicare Part D claims for 58 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
What is Mark W. Walter, M.D's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.