Dorothy Lam, M.D.
NPI 1497911044 · Diagnostic Radiology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dorothy Lam, M.D. is a Diagnostic Radiology Physician provider in Chicago, IL (NPI 1497911044).
Provider details
- NPI number
- 1497911044
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 036-120792 (IL)
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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,032 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) |
|---|---|---|
| Screening Mammography77067 | 585 | $40 |
| Screening 3d Breast Mammography77063 | 580 | $31 |
| X-Ray of Chest, 1 View71045 | 327 | $9 |
| Nuclear Medicine Studies of Heart Muscle at Rest and With Stress and Spect78452 | 270 | $80 |
| Ct Scan Head Or Brain Without Contrast70450 | 133 | $42 |
| Diagnostic Digital Breast Tomosynthesis, Unilateral Or Bilateral (list Separately in Addition to 77065 Or 77066)G0279 | 126 | $30 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$422 across 3 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
Additional practice locations (1)
- 1750 W Harrison StChicago, IL 60612-3825Phone: (312) 942-5000
Registry dates
- Enumerated
- 2008-08-04
- Last updated
- 2025-12-30
- Certified
- 2025-12-30
Frequently asked questions
- What is Dorothy Lam's NPI number?
- Dorothy Lam's National Provider Identifier (NPI) is 1497911044, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dorothy Lam's specialty?
- Dorothy Lam is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Dorothy Lam located?
- Dorothy Lam's practice location on file with NPPES is 5145 N. California Ave., Chicago, IL 60625-3661.
- What is Dorothy Lam's phone number?
- The practice phone number listed in the NPPES registry for Dorothy Lam is (773) 989-3814.
- Does Dorothy Lam accept Medicare?
- Dorothy Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dorothy Lam's NPI active?
- Yes — Dorothy Lam's NPI (1497911044) is active in the NPPES registry as of the last update on 2025-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.