David Mcmahon, DO
NPI 1457662249 · Psychiatry Physician · Green Bay, WI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Mcmahon, DO is a Psychiatry Physician provider in Green Bay, WI (NPI 1457662249).
Provider details
- NPI number
- 1457662249
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 63216-21 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
421 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 201 | $119 |
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 85 | $68 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 84 | $14 |
| Psychiatric Diagnostic Evaluation With Medical Services90792 | 28 | $185 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $81 |
Typical Medicare-allowed amounts for these services range $14–$185 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Aripiprazole | 118 | 36 |
| Buspirone Hcl | 114 | 30 |
| Quetiapine Fumarate | 107 | 23 |
| Duloxetine Hcl | 89 | 26 |
| Trazodone Hcl | 89 | 31 |
| Lorazepam | 88 | 18 |
| Lamotrigine | 82 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,396 across 61 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-25
- Last updated
- 2021-10-18
- Certified
- 2021-10-18
Frequently asked questions
- What is David Mcmahon's NPI number?
- David Mcmahon's National Provider Identifier (NPI) is 1457662249, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Mcmahon's specialty?
- David Mcmahon is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is David Mcmahon located?
- David Mcmahon's practice location on file with NPPES is 301 E Saint Joseph St, Green Bay, WI 54301-2241.
- What is David Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for David Mcmahon is (920) 433-3630.
- Does David Mcmahon accept Medicare?
- David Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Mcmahon's NPI active?
- Yes — David Mcmahon's NPI (1457662249) is active in the NPPES registry as of the last update on 2021-10-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.