Najmul Siddiqui, M.D.
NPI 1558527580 · Family Medicine Physician · Aurora, CO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Najmul Siddiqui, M.D. is a Family Medicine Physician provider in Aurora, CO (NPI 1558527580).
Provider details
- NPI number
- 1558527580
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 5786 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
1,004 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 452 | $72 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 272 | $110 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 192 | $105 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 49 | $160 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 39 | $120 |
Typical Medicare-allowed amounts for these services range $72–$160 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 45 | 28 |
| Pantoprazole Sodium | 35 | 21 |
| Metoprolol Succinate | 27 | 13 |
| Potassium Chloride | 25 | 17 |
| Prednisone | 24 | 24 |
| Apixabanbrand: Eliquis | 24 | — |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$458 across 5 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
- 2008-07-30
- Last updated
- 2012-10-16
Frequently asked questions
- What is Najmul Siddiqui's NPI number?
- Najmul Siddiqui's National Provider Identifier (NPI) is 1558527580, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Najmul Siddiqui's specialty?
- Najmul Siddiqui is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Najmul Siddiqui located?
- Najmul Siddiqui's practice location on file with NPPES is 2400 S Peoria St, Aurora, CO 80014-5476.
- What is Najmul Siddiqui's phone number?
- The practice phone number listed in the NPPES registry for Najmul Siddiqui is (720) 524-1550.
- Does Najmul Siddiqui accept Medicare?
- Najmul Siddiqui is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Najmul Siddiqui's NPI active?
- Yes — Najmul Siddiqui's NPI (1558527580) is active in the NPPES registry as of the last update on 2012-10-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.