Physician Profile
Unclaimed ProfileAbout BRENNAN
Patrick Brennan, M.D., PhD is a healthcare provider in Boston, MA specializing in allergy/immunology. Patrick trained at Perelman School of Med at the University of Pennsylvania, graduating in 2005. Patrick is also listed as specializing in internal medicine. According to Medicare claims data, Patrick cared for 95 Medicare patients across 307 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
Common questions
What is Dr. Brennan's specialty?
Dr. Brennan is an allergy/immunology in Boston, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ALLERGY/IMMUNOLOGY”.
NPI registry
Where can I find Dr. Brennan?
Dr. Brennan is listed at 75 FRANCIS ST, Boston, MA 02115. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Brennan?
The number on file is (617) 732-9850. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Brennan's NPI number?
Dr. Brennan's National Provider Identifier is 1053458406. 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
What is Dr. Brennan's medical education?
Dr. Brennan attended Perelman School of Med at the University of Pennsylvania, graduating in 2005. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Brennan been practicing?
Dr. Brennan has 21 years experience. Calculated from a graduation year of 2005, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Brennan known for?
According to Medicare billing data, Dr. Brennan provides treatments such as test for allergy using allergenic extract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Brennan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Brennan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (617) 732-9850
- Email not available
Practice Locations
75 FRANCIS ST
Boston, MA 02115
Procedures Most Often Billed to Medicare
307 services · 95 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Test for allergy using allergenic extract | Treatment | 95004 |
217 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
40 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
34 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
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 allergy/immunology specialists in Boston 8
Same specialty, same city.
Trained at Perelman School of Med at the University of Pennsylvania 4
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2005 at Perelman School of Med at the University of Pennsylvania 8
Providers who graduated from the same medical school in the same year.
Also performs Test for allergy using allergenic extract 8
Providers in MA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.