Physician Profile
Vernissia Tam, MD
Unclaimed ProfileAbout Dr. Tam
Vernissia Tam, MD is a healthcare provider in Frederick, MD specializing in colorectal surgery (proctology). Vernissia is also listed as specializing in student in an organized health care education program and colon & rectal surgery. According to Medicare claims data, Vernissia cared for 231 Medicare patients across 252 services. The services billed most often include diagnostic exam of anus using an endoscope, established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more. This provider record is associated with NPI 1528344116.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (240) 575-2526
- Email not available
Practice Locations
194 THOMAS JOHNSON DR
Frederick, MD 21702
600 N Wolfe St
Baltimore, MD 21287
Conditions Commonly Evaluated or Treated
Within Colon and Rectal Surgery 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
- Anal fissures
- Colon cancer
- Crohn's disease
- Diverticulitis
- Hemorrhoids
Anorectal conditions
- Anal fistula
- Rectal Ulcer
Anorectal disorders
- Anal Itching
- Anal Skin Tags
- Anal Stricture
- Perianal Hematoma
- Rectovaginal Fistula
Bowel disorders
- Bowel Blockage in Babies
- Chronic diarrhea
- Constipation From Pain Medicine
- Difficulty Emptying Bowels
- Severely Enlarged Colon
- Twisted Bowel
Bowel symptoms
- Constipation
- Diverticulosis
- Lower gastrointestinal bleeding
Cancer
- Anal cancer
- Appendix cancer
- Inherited Cancer Risk
- Precancerous Anal Cells
Colon conditions
- Inherited Colon Polyps
Digestive emergencies
Infections
- C. diff Infection
Infections & cysts
Inflammatory bowel disease
- Radiation Proctitis
- Ulcerative colitis
Inflammatory conditions
- Rectal Inflammation
Ostomy & surgical complications
- Stoma Problems
Pain
- Rectal Pain
- Tailbone pain
Pelvic disorders
- Bowel Endometriosis
Pelvic floor & structure
Skin conditions
- Perianal Boils
Tumors & growths
Vascular & inflammatory
Procedures & services
Most searched procedures
- Bowel resection
- Colonoscopy
- Fistula repair
- Hemorrhoid removal
Abdominal surgery
- Appendectomy
- Bowel Adhesion Removal
Anorectal procedures
- Anal Dilation
Bowel management
- Transanal Irrigation
Cancer screening
Cancer surgery
- Complete Rectum and Anus Removal
- Heated Chemotherapy for Abdominal Cancer
- Low Anterior Resection
Diagnostic tests
- Endorectal Ultrasound
- J-Pouch Scope
- Rectal Exam with Scope
Diagnostics
- Defecography
- High-Resolution Anorectal Manometry
- High-Resolution Anoscopy
- Prostate Ultrasound
Digestive health
Endoscopy & minimally invasive
- Colon polyp removal
- Flexible sigmoidoscopy
- Transanal Minimally Invasive Surgery
Excision & drainage
- Anal Skin Tag Removal
- Anal Wart Removal
- Drainage of anal abscess
- Pilonidal cyst surgery
Fistula procedures
- Seton Drain Placement
Hemorrhoid treatments
- Hemorrhoid Injections
- Laser Hemorrhoid Treatment
- Rubber-band ligation of hemorrhoids
Inflammatory bowel surgery
- Bowel-Sparing Surgery for Crohn's
Injections & pain relief
- Anal Sphincter Botox
Minimally invasive surgery
- Robotic Colon Surgery
Ostomy surgery
- Colostomy Placement
- Ileostomy Surgery
- Parastomal Hernia Repair
- Stoma Revision
Pelvic floor & prolapse
Pelvic therapy
- Pelvic Biofeedback Therapy
Reconstructive surgery
- Anal Sphincter Repair
- J-Pouch Surgery
- Ostomy reversal
- Rectovaginal Fistula Repair
Therapy & rehabilitation
Procedures Most Often Billed to Medicare
252 services · 231 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of anus using an endoscope | Procedure | 46600 |
67 | More often than most peers in Colorectal Surgery (Proctology) |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
61 | More than most peers in Colorectal Surgery (Proctology) |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
58 | More often than most peers in Colorectal Surgery (Proctology) |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
29 | As often as other peers in Colorectal Surgery (Proctology) |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
13 | Too few peers to compare |
| 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 |
13 | Less often than most peers in Colorectal Surgery (Proctology) |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
11 | Less often than most peers in Colorectal Surgery (Proctology) |
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.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Other 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Diagnostic exam of anus using an endoscope 8
Providers in MD who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Tam?
Dr. Tam is a colorectal surgery (proctology) in Frederick, MD. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Tam's address?
Dr. Tam is listed at 194 Thomas Johnson Dr, Frederick, MD 21702. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Tam?
The number on file is (240) 575-2526. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Tam's NPI number?
Dr. Tam's National Provider Identifier is 1528344116. 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. Tam train?
Dr. Tam attended Other, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Tam been practicing?
Dr. Tam has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Tam perform?
According to Medicare billing data, Dr. Tam performs procedures including diagnostic exam of anus using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Tam confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Tam. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.