David Holloway, M.D.
NPI 1821195777 · Psychiatry Physician · Waukesha, WI
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Holloway, M.D. is a Psychiatry Physician provider in Waukesha, WI (NPI 1821195777).
Provider details
- NPI number
- 1821195777
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 27991-020 (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
19 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
674 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) |
|---|---|---|
| Psychotherapy With Evaluation and Management Visit, 30 Minutes90833 | 337 | $65 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 337 | $75 |
Typical Medicare-allowed amounts for these services range $65–$75 (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 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lamotrigine | 373 | 61 |
| Trazodone Hcl | 371 | 67 |
| Alprazolam | 356 | 49 |
| Duloxetine Hcl | 316 | 59 |
| Bupropion Hclbrand: Bupropion Xl | 284 | 51 |
| Escitalopram Oxalate | 257 | 41 |
| Dextroamphetamine/Amphetamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,201 across 123 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
- 2006-09-20
- Last updated
- 2008-04-04
Frequently asked questions
- What is David Holloway's NPI number?
- David Holloway's National Provider Identifier (NPI) is 1821195777, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Holloway's specialty?
- David Holloway is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is David Holloway located?
- David Holloway's practice location on file with NPPES is 2717 N Grandview Blvd Ste 303, Waukesha, WI 53188-1660.
- What is David Holloway's phone number?
- The practice phone number listed in the NPPES registry for David Holloway is (262) 544-6486.
- Does David Holloway accept Medicare?
- David Holloway is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Holloway's NPI active?
- Yes — David Holloway's NPI (1821195777) is active in the NPPES registry as of the last update on 2008-04-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.