DR. DONALD GUSTAVE AMMERMAN (M.D.) – Psychiatry Physician, NPI 1316032295
Psychiatry Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
851 PSYCHIATRY in CT
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Provider Addresses for DR. DONALD GUSTAVE AMMERMAN (M.D.)
84, Hospital Avenue, Germantown, Danbury, Fairfield County, Connecticut, 06810, United States
CPC ASSOCIATES
DANBURY, CT 06810
Phone: (203) 792-6060
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 717 Open Payments records for all available years, with a total value of $530,992.
Total Amount is formed as General ($530,992) + Research ($0) + Ownership ($0) = $530,992.
Last reported payment date: 2024-12-23 • Largest payer in this snapshot: ABBVIE INC. ($271,253).
Total Amount
$530,992
General + Research + Ownership
Payments
717
Total payment records
General Amount
$530,992
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $271,253 |
| ITI, Inc. | $115,119 |
| ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.) | $111,737 |
| Neurocrine BioSciences Inc. | $32,189 |
| E.R. Squibb & Sons, L.L.C. | $173 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2009-11-03
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20091103000486 | I | Psychiatry | CT | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 289 | 54 | $0 |
| 90833 | Psychotherapy with evaluation and management visit, 30 minutes | 247 | 44 | $0 |
Insurance plans in this area (ZIP 06810)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PSYCHIATRY | CT | 90833 | Psychotherapy, 30 minutes with patient and/or family member | 341 | 73 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Mental Health Counselor | CT | |
| P S Y C H I A T R Y | NY | |
| Clinical Social Worker | CT | |
| Nurse Practitioner | NY | |
| Mental Health Counselor | CT | |
| Clinical Social Worker | NY | |
| Mental Health Counselor | CT | |
| Nurse Practitioner | MA | |
| Physician Assistant | NH | |
| P S Y C H I A T R Y | CT |
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