Philip Muller, D.O.
NPI 1891756128 · Psychiatry Physician · Sioux City, IA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Philip Muller, D.O. is a Psychiatry Physician provider in Sioux City, IA (NPI 1891756128).
Provider details
- NPI number
- 1891756128
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 03099 (IA)
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
20 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
324 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 | 154 | $115 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 119 | $72 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 39 | $120 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 12 | $74 |
Typical Medicare-allowed amounts for these services range $72–$120 (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 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 332 | 44 |
| Bupropion Hclbrand: Bupropion Xl | 232 | 23 |
| Sertraline Hcl | 164 | 19 |
| Lorazepam | 145 | 25 |
| Aripiprazole | 131 | 17 |
| Trazodone Hcl | 117 | 21 |
| Clozapine | 117 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,002 across 52 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
- 2006-03-28
- Last updated
- 2007-12-21
Frequently asked questions
- What is Philip Muller's NPI number?
- Philip Muller's National Provider Identifier (NPI) is 1891756128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Philip Muller's specialty?
- Philip Muller is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Philip Muller located?
- Philip Muller's practice location on file with NPPES is 600 4th St, Sioux City, IA 51101-1750.
- What is Philip Muller's phone number?
- The practice phone number listed in the NPPES registry for Philip Muller is (712) 234-0220.
- Does Philip Muller accept Medicare?
- Philip Muller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Philip Muller's NPI active?
- Yes — Philip Muller's NPI (1891756128) is active in the NPPES registry as of the last update on 2007-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.