Physician Profile
John M. Stewart, M.D., PhD
Unclaimed ProfileAbout Dr. Stewart
John M. Stewart, M.D., PhD practices cytopathology in Houston, TX. John is a 1993 graduate of University of Virginia School of Medicine. According to Medicare claims data, John cared for 1,890 Medicare patients across 2,789 services. The services billed most often include evaluation of fine needle aspirate with interpretation and report, pathology examination of tissue using a microscope, intermediate complexity, and cell examination of specimen, concentration technique.
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
- (713) 792-6161
- Email not available
Practice Locations
1515 HOLCOMBE BLVD
Houston, TX 77030
Conditions Evaluated or Diagnosed
Within Pathology 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
Autoimmune & Joints
Autopsy & Forensic
Blood & Metabolism
Blood Disorders
- Bleeding Disorders
- Blood Clotting Gene Mutation
- Iron-deficiency anemia
- Leukemia
- Lymphoma
- Multiple Myeloma
- Sickle cell disease
Cancer
- Bladder cancer
- Bone tumors
- Brain tumor
- Breast cancer
- Cervical cancer
- Colon cancer
- Endometrial cancer
- Kidney cancer
- Liver cancer
- Lung cancer
- Oral cavity cancer
- Ovarian cancer
- Pancreatic cancer
- Prostate cancer
- Soft-tissue sarcoma
- Stomach cancer
- Testicular cancer
- Thyroid cancer
Cervical & Gynecologic
Digestive
Digestive System
Endocrine
Genetics
Hormones
Immune System
Infections
Kidney
Liver
Metabolic & Routine Lab
Pregnancy & Fertility
Skin Cancer
Women's Health
Procedures & services
Autopsy & Forensic
Blood Tests
- Blood Clotting Tests
- Blood Type Test
- Cholesterol screening
- Complete Blood Count
- Comprehensive Metabolic Panel
- Hemoglobin A1c Test
- Iron Level Blood Test
- Thyroid Blood Test
Cytology
Cytology & Screening
- Fine-needle aspiration of a neck mass
- Human papillomavirus testing
- Pap Smear Test
- Thyroid Nodule Biopsy Review
Genetic & Molecular Tests
Genetics
Immune & Allergy Tests
Infection Testing
Infection Tests
Lab & Blood Tests
- Cardiac enzyme blood test
- Pregnancy blood test
- Sed rate inflammation test
- Testosterone blood test
- Vitamin D blood test
Pathology Review
Pregnancy & Fertility
Routine Lab Tests
Tissue Biopsy
- Bone Marrow Biopsy Interpretation
- Breast Biopsy Analysis
- Cervical biopsy lab review
- Colon Polyp Testing
- Kidney Biopsy Examination
- Liver Biopsy Examination
- Lung biopsy lab review
- Lymph Node Biopsy Analysis
- Oral biopsy lab review
- Prostate Biopsy Analysis
- Skin Biopsy Lab Review
- Stomach biopsy lab review
- Uterine biopsy lab review
Procedures Most Often Billed to Medicare
2,789 services · 1,890 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Fine needle aspiration biopsy, first growth | Procedure | 10021 |
17 | |
| Evaluation of fine needle aspirate with interpretation and report | Lab test | 88173 |
656 | More than most peers in Cytopathology |
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
612 | More often than most peers in Cytopathology |
| Cell examination of specimen, concentration technique | Lab test | 88108 |
473 | More than most peers in Cytopathology |
| Evaluation of fine needle aspirate | Lab test | 88172 |
320 | More than most peers in Cytopathology |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
170 | As often as other peers in Cytopathology |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
108 | More often than most peers in Cytopathology |
| Surgical pathology consultation and report on referred slides prepared elsewhere | Lab test | 88321 |
106 | More often than most peers in Cytopathology |
| Microscopic genetic analysis of tumor, manual | Lab test | 88360 |
89 | More often than most peers in Cytopathology |
| Special stained specimen slides to identify organisms including interpretation and report | Lab test | 88312 |
71 | More often than most peers in Cytopathology |
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 cytopathology specialists in Houston 8
Same specialty, same city.
Class of 1993 at University of Virginia School of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 4 related providers in 1 group
Also performs Fine needle aspiration biopsy, first growth 4
Providers in TX who bill this service to Medicare most often.
Common questions
What does Dr. Stewart specialize in?
Dr. Stewart is a cytopathology in Houston, TX. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Stewart located?
Dr. Stewart is listed at 1515 Holcombe Blvd, Houston, TX 77030. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Stewart's phone number?
The number on file is (713) 792-6161. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Stewart's NPI number?
Dr. Stewart's National Provider Identifier is 1467514000. 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. Stewart go to medical school?
Dr. Stewart attended University of Virginia School of Medicine, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Stewart been practicing?
Dr. Stewart has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Stewart do most often?
According to Medicare billing data, Dr. Stewart performs procedures including fine needle aspiration biopsy, first growth, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Stewart confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Stewart. 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.