Physician Profile
Calvin T. Williams, M.D. / PH.D
Unclaimed ProfileAbout Dr. Williams
Calvin T. Williams, M.D. / PH.D is a healthcare provider in Baltimore, MD specializing in infectious disease. Calvin trained at University of Maryland School of Medicine, graduating in 2011. Calvin is also listed as specializing in internal medicine and student in an organized health care education program. According to Medicare claims data, Calvin cared for 655 Medicare patients across 892 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes, and established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more.
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
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (443) 474-9911
- Email not available
Practice Locations
201 E UNIVERSITY PKWY DEPT OF MEDICINE MEDSTAR UNION MEMORIAL HOSPITAL
Baltimore, MD 21218
Conditions Commonly Evaluated or Treated
Within Infectious Disease generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Bacterial infections
- C. diff Infection
- Cat Scratch Fever
- Drug-Resistant Bacterial Infection
- Flesh-Eating Infection
- NTM lung infection
- Recurrent bacterial vaginosis
- Tick-Borne Infection
- Tuberculosis
Bones & joints
Cardiovascular
Digestive infections
Fungal infections
- Aspergillosis mold infection
- Chronic Yeast Infection
- Cryptococcal fungal infection
- Fungal lung infection
- Fungal sinus infection
- Valley fever
General symptoms
Neurological infections
Parasitic infections
Post-infection conditions
Respiratory infections
Sexually transmitted infections
Skin & soft tissue
- Cellulitis
- Diabetic Foot Infection
- Dog or Animal Bite Infection
- Non-Healing Wound Infection
- Post-surgery fever or infection
- Skin and soft-tissue abscess
Travel-related infections
Urinary tract
Viral infections
- Chronic Epstein-Barr virus reactivation
- Cytomegalovirus
- Hepatitis B
- Mononucleosis
- Mpox
- Shingles
- West Nile virus
Procedures & services
Most searched procedures
Allergy & immunology
Allergy & Pharmacology
Antiviral treatments
Consultation & second opinions
- Diabetic Foot Ulcer Debridement Consultation
- Infection Screening Before Biologics
- Post-Travel Illness Workup
- Pre-Chemotherapy Infection Clearance
- Pre-Transplant Infection Screening
- Prosthetic Hardware Infection Evaluation
- Second Opinion on Antibiotic Treatment
Diagnostic evaluations
- Chronic viral fatigue evaluation
- Medical parasite clearance evaluation
- Post-sepsis syndrome evaluation
- Sinus infection culture evaluation
- Unexplained fever workup
Diagnostics & screening
- Blood Culture Workup
- Fungal Blood Testing
- Immune System Workup for Frequent Infections
- Joint injection or aspiration
- Spinal Tap Infection Analysis
- Stool Parasite Testing
- TB Skin Test
- Tuberculosis Blood Test
- Wound Culture and Sensitivity
Gastrointestinal treatments
Infusions & Medications
Lab testing & monitoring
- Comprehensive STI screening panel
- HIV viral load monitoring
- Infectious diarrhea stool pathogen PCR panel
- Mold and environmental fungal testing
- Specialized Lyme disease confirmation testing
- Tropical disease blood work
Medication management
- Atypical Mycobacteria Treatment Plan
- Chronic Hepatitis B Medication Management
- Infected Central Line Removal Coordination
- Malaria Treatment
- Oral Antibiotic Step-Down Therapy
- Recurrent Shingles Suppression
- Syphilis Injections
- Systemic Antifungal Therapy
Prevention & Prophylaxis
Prevention & prophylaxis
- Emergency HIV Prevention (PEP)
- Needlestick Injury Evaluation
- Rabies Post-Exposure Shots
- Tick Bite Evaluation
Travel medicine
Procedures Most Often Billed to Medicare
892 services · 655 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
457 | More often than most peers in Infectious Disease |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
353 | More than most peers in Infectious Disease |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
82 | More often than most peers in Infectious Disease |
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 infectious disease specialists in Baltimore 8
Same specialty, same city.
Trained at University of Maryland 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 2011 at University of Maryland School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Calvin T. Williams's specialty?
Calvin T. Williams is an infectious disease specialist in Baltimore, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Infectious Disease”.
NPI registry
Where can I find Calvin T. Williams?
Calvin T. Williams is listed at 201 E University Pkwy Dept of Medicine Medstar Union Memorial Hospital, Baltimore, MD 21218. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Calvin T. Williams?
The number on file is (443) 474-9911. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Calvin T. Williams's NPI number?
Calvin T. Williams's National Provider Identifier is 1023308640. 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 Calvin T. Williams's education?
Calvin T. Williams attended University of Maryland School of Medicine, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How long has Calvin T. Williams been practicing?
Calvin T. Williams has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What is Calvin T. Williams known for?
According to Medicare billing data, Calvin T. Williams 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 Calvin T. Williams confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Calvin T. Williams. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.