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DR. GREGORY LYNN KELLER D.O.
NPI 1649385287
Psychiatry & Neurology - Psychiatry in Clarinda, IA

Active since August 21, 2006PECOS EnrolledAccepts Medicare Assignment
220 ESSIE DAVISON DR, CLARINDA, IA 51632(712) 542-8354 Get Directions Write a Review

NPPES record last updated: January 26, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 26, 2026, Jan 23, 2026 (2 updates tracked since 2026).

About Dr. Gregory Lynn Keller D.o. NPPES

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

DR. GREGORY LYNN KELLER D.O. (NPI 1649385287) is an individual psychiatry provider in Clarinda, Iowa, licensed in Iowa (3716) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Clarinda Regional Health Center, and is a graduate of University Of Kansas School Of Med (kc/wich/sal) (2004).

NPPES Registry Identity

NPI1649385287
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. GREGORY LYNN KELLERCredential: D.O.
Location Address220 ESSIE DAVISON DRClarinda, IA 51632-2915
Mailing Address220 Essie Davison DrClarinda, IA 51632-2915 · (712) 542-8354
Phone(712) 542-8354
Sole ProprietorYes
Medical School CMSUniversity Of Kansas School Of Med (kc/wich/sal)Graduated 2004
Enumeration DateAugust 21, 2006
Last NPPES UpdateJanuary 26, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 26, 2026
✔ NPI 1649385287 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 IA · 3716✔ Licensed in NE · 3114
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.
220 ESSIE DAVISON DR, Clarinda, IA 51632
Open in Google Maps ↗

Other Identifiers 2

Other3716IA · License
Other3114NE · License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health 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 and accepts Medicare assignment

Dr. Gregory Lynn Keller D.o. 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 ID8820285760
PECOS Enrollment IDI20101206000044, I20260130001362
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

3

Medicare enrollment records show Gregory Keller reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clarinda Regional Health Center
Same address
Critical Access
220 ESSIE DAVISON DR
Clarinda, IA 51632
  • Reassigned Medicare billing, Iowa enrollment
  • 130 clinicians in this Medicare group
NPI 1366486946 (712) 542-2176
Cass County Memorial Hospital
39 mi
Rural Health
92 MAIN ST
Massena, IA 50853
  • Reassigned Medicare billing, Iowa enrollment
  • Also billed through NPI 1093760944 (Iowa)
  • 112 clinicians in this Medicare group
NPI 1447451331 (712) 779-3626
Memorial Community Hospital Corporation
71 mi
Rural Health
4929 COUNTY ROAD P43
Fort Calhoun, NE 68023
  • Reassigned Medicare billing, Nebraska enrollment
  • Also billed through NPI 1265408819 (Nebraska)
  • 69 clinicians in this Medicare group
NPI 1417015207 (402) 468-4655

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

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Clarinda Regional Health Center

Critical Access Hospitals · Clarinda, IA
4/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number161352
Location220 Essie Davison DriveClarinda, IA 51632 · Page County
Emergency services

Cass County Memorial Hospital

Critical Access Hospitals · Atlantic, IA
4/5 CMS rating
OwnershipGovernment - Local
CMS Certification Number161376
Location1501 East Tenth StreetAtlantic, IA 50022 · Cass County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 51632 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.

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.

RENEE NAUMAN ARNP
Nurse Practitioner (Family)
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-2176
DR. ROBERT WILLARD CLEMONS JR. MD
Family Medicine
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-2176
JESSICA L DIVINE LMSW
Social Worker (Clinical)
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-2176
KATIE BURNS ARNP
Nurse Practitioner
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-8330
UROLOGY CENTER, PC
Urology
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-8216
MELISA S. BAIER RD, LD
Dietitian, Registered
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-2176
CHRISTINA MARIE SOLT DNP, FNP-C
Nurse Practitioner (Family)
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-2176
DR. GEORGE WILLIAM RICHARDSON M.D.
Family Medicine
220 ESSIE DAVISON DR
CLARINDA, IA 51632
Page County (712) 542-8330

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 Keller's NPI number?

The NPI number for Gregory Keller is 1649385287. It was assigned to this individual provider in the NPPES registry on August 21, 2006.

Where is Gregory Keller located?

Gregory Keller practices at 220 Essie Davison Dr, Clarinda, IA 51632. The listed phone number is (712) 542-8354.

What is Gregory Keller's specialty?

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

Is Gregory Keller enrolled in Medicare?

Yes. Gregory Keller 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 Gregory Keller's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Keller reassigns Medicare benefits to 3 organizations: Clarinda Regional Health Center (Clarinda, IA), Cass County Memorial Hospital (Massena, IA) and Memorial Community Hospital Corporation (Fort Calhoun, NE). 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 Gregory Keller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Keller accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Blue Cross and Blue Shield of Nebraska and 4 other insurers list Gregory Keller 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.

Is Gregory Keller affiliated with any hospitals?

According to CMS data, Gregory Keller is affiliated with Clarinda Regional Health Center and Cass County Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Keller was last updated on January 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.