Physician Profile
Unclaimed ProfileAbout HAGAN
Based in Baltimore, MD, Robert Stewart Hagan, M.D., PhD is listed in the NPI registry under pulmonary disease. Robert graduated from Harvard Medical School in 2007. Robert is also listed as specializing in internal medicine. According to Medicare claims data, Robert cared for 81 Medicare patients across 180 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (410) 955-7963
- Email not available
Practice Locations
JOHNS HOPKINS MEDICINE 600 N. WOLFE ST.
Baltimore, MD 21287
Procedures Most Often Billed to Medicare
180 services · 81 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Critical care, first 30-74 minutes | Office visit | 99291 |
142 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
22 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other pulmonary diseases at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other pulmonary diseases in Baltimore 8
Same specialty, same city.
More connections — 15 related providers in 2 groups
Trained at Harvard Medical School 7
Other providers in the same specialty who trained at the same institution.
Class of 2007 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Dr. Hagan specialize in?
Dr. Hagan is a pulmonary disease in Baltimore, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PULMONARY DISEASE”.
NPI registry
Where is Dr. Hagan located?
Dr. Hagan is listed at JOHNS HOPKINS MEDICINE 600 N. WOLFE ST., Baltimore, MD 21287. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Hagan's phone number?
The number on file is (410) 955-7963. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Hagan's NPI number?
Dr. Hagan's National Provider Identifier is 1265635858. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Hagan go to medical school?
Dr. Hagan attended Harvard Medical School, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hagan been practicing?
Dr. Hagan has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Hagan do most often?
According to Medicare billing data, Dr. Hagan the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Hagan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hagan. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.