Philip Siefken, M.D.
NPI 1689629107 · Pediatrics Physician · Greenville, IL
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Philip Siefken, M.D. is a Pediatrics Physician provider in Greenville, IL (NPI 1689629107).
Provider details
- NPI number
- 1689629107
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036088335 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
21 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Urinalysis, Manual Test81002 | 21 | $3 |
Typical Medicare-allowed amounts for these services range $3–$3 (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 · 125 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 406 | 98 |
| Levothyroxine Sodium | 388 | 83 |
| Lisinopril | 274 | 71 |
| Metoprolol Succinate | 239 | 61 |
| Gabapentin | 180 | 37 |
| Metformin Hcl | 170 | 47 |
| Apixaban |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2026-01-07
- Certified
- 2026-01-07
Frequently asked questions
- What is Philip Siefken's NPI number?
- Philip Siefken's National Provider Identifier (NPI) is 1689629107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Philip Siefken's specialty?
- Philip Siefken is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Philip Siefken located?
- Philip Siefken's practice location on file with NPPES is 1000 Red Ball Trl, Greenville, IL 62246-2781.
- What is Philip Siefken's phone number?
- The practice phone number listed in the NPPES registry for Philip Siefken is (618) 664-1240.
- Does Philip Siefken accept Medicare?
- Philip Siefken is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Philip Siefken's NPI active?
- Yes — Philip Siefken's NPI (1689629107) is active in the NPPES registry as of the last update on 2026-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.