William Clapp, MD
NPI 1174721229 · Pulmonary Disease Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Clapp, MD is a Pulmonary Disease Physician provider in Chicago, IL (NPI 1174721229).
Provider details
- NPI number
- 1174721229
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036-091299 (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
18 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
102 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 102 | $101 |
Typical Medicare-allowed amounts for these services range $101–$101 (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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 161 | 55 |
| Prednisone | 125 | 36 |
| Umeclidinium Bromidebrand: Incruse Ellipta | 48 | 23 |
| Tiotropium Bromidebrand: Spiriva Handihaler | 45 | 14 |
| Fluticasone/Vilanterolbrand: Breo Ellipta | 38 | 12 |
| Albuterol Sulfatebrand: Ventolin Hfa | 35 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-07-10
- Last updated
- 2021-04-22
- Certified
- 2021-04-22
Frequently asked questions
- What is William Clapp's NPI number?
- William Clapp's National Provider Identifier (NPI) is 1174721229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Clapp's specialty?
- William Clapp is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Clapp located?
- William Clapp's practice location on file with NPPES is 2160 W Ogden Ave, Chicago, IL 60612-4219.
- What is William Clapp's phone number?
- The practice phone number listed in the NPPES registry for William Clapp is (312) 746-6003.
- Does William Clapp accept Medicare?
- William Clapp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Clapp's NPI active?
- Yes — William Clapp's NPI (1174721229) is active in the NPPES registry as of the last update on 2021-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.