Physician Profile
Unclaimed ProfileAbout MESSMER
Marcus Messmer practices hematology/oncology in Philadelphia, PA. Marcus is a 2014 graduate of Johns Hopkins University School of Medicine. Marcus is also listed as specializing in student in an organized health care education program and medical oncology. According to Medicare claims data, Marcus cared for 179 Medicare patients across 304 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
- (215) 707-4000
- Email not available
Practice Locations
3401 N BROAD ST
Philadelphia, PA 19140
Procedures Most Often Billed to Medicare
304 services · 179 patients · 3 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
160 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
120 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
24 |
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.
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 hematology/oncology specialists in Philadelphia 8
Same specialty, same city.
Trained at Johns Hopkins University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2014 at Johns Hopkins University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Dr. Messmer's specialty?
Dr. Messmer is a hematology/oncology in Philadelphia, PA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “HEMATOLOGY/ONCOLOGY”.
NPI registry
Where can I find Dr. Messmer?
Dr. Messmer is listed at 3401 N BROAD ST, Philadelphia, PA 19140. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Messmer?
The number on file is (215) 707-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Messmer's NPI number?
Dr. Messmer's National Provider Identifier is 1285070490. 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. Messmer's medical education?
Dr. Messmer attended Johns Hopkins University School of Medicine, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Messmer been practicing?
Dr. Messmer has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Messmer known for?
According to Medicare billing data, Dr. Messmer 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. Messmer confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Messmer. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.