JOHN W SONDAG L.M.H.C.
NPI 1912125360
Counselor - Mental Health in Denison, IA
About John W Sondag L.m.h.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN W SONDAG L.M.H.C. (NPI 1912125360) is an individual mental health provider in Denison, Iowa, licensed in Iowa (00799) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1990).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John W Sondag L.m.h.c. 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.
Medicare Billing Reassignments
2Medicare enrollment records show John Sondag reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hiawatha, IA 52233
- Reassigned Medicare billing, Iowa enrollment
- 19 clinicians in this Medicare group
Cedar Rapids, IA 52401
- Reassigned Medicare billing, Iowa enrollment
- 43 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
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.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DENISON, IA 51442
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 John Sondag's NPI number?
The NPI number for John Sondag is 1912125360. It was assigned to this individual provider in the NPPES registry on April 23, 2007.
Where is John Sondag located?
John Sondag practices at 20 N 14th St, Denison, IA 51442. The listed phone number is (712) 263-3172.
What is John Sondag's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is John Sondag enrolled in Medicare?
Yes. John Sondag 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.
Which organizations bill Medicare for John Sondag's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Sondag reassigns Medicare benefits to 2 organizations: Abbe Management Corp (Hiawatha, IA) and Abbe Center For Community Mental Health, Inc (Cedar Rapids, IA). 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 John Sondag's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Sondag accept?
Health plans from Medica, Oscar Health, Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list John Sondag 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 John Sondag was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# John W Sondag, L.M.H.C. · NPI 1912125360
Mental Health provider in Denison, Iowa. Individual provider, active in the CMS NPPES registry since April 23, 2007.
## Identity
- **NPI:** 1912125360 (Entity type: Individual)
- **Enumerated:** April 23, 2007
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** 00799 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 N 14TH ST, Denison, IA 51442-2026
- **Phone:** (712) 263-3172 · **Fax:** (712) 263-5756
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Abbe Management Corp (NPI 1811998859, Hiawatha, IA); Abbe Center For Community Mental Health, Inc (NPI 1063586071, Cedar Rapids, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1912125360) · Data from the CMS NPPES public registry.