Joan Mullan, MD
NPI 1396856019 · Internal Medicine Physician · Chicago, IL
Joan Mullan, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1396856019).
Provider details
- NPI number
- 1396856019
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036087186 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Hydrochlorothiazide | 13 |
| Metoprolol Succinate | 12 |
| Gabapentin | 12 |
| Levetiracetam | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2007-07-08
Frequently asked questions
- What is Joan Mullan's NPI number?
- Joan Mullan's National Provider Identifier (NPI) is 1396856019, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joan Mullan's specialty?
- Joan Mullan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joan Mullan located?
- Joan Mullan's practice location on file with NPPES is 211 E Chicago Ave, Chicago, IL 60611-2637.
- What is Joan Mullan's phone number?
- The practice phone number listed in the NPPES registry for Joan Mullan is (312) 944-6677.
- Is Joan Mullan's NPI active?
- Yes — Joan Mullan's NPI (1396856019) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.