Physician Profile
Margarita R. Johnston, MD
Unclaimed ProfileAbout Dr. Johnston
Margarita R. Johnston, MD is a healthcare provider in Ennis, TX specializing in urology. Medicare claims data shows Margarita provided 1,318 services to 964 patients. The services billed most often include automated urinalysis test, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and ultrasound measurement of bladder capacity after voiding. This provider record is associated with NPI 1306897137.
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
- (903) 229-4292
- Email not available
Practice Locations
206 S CLAY ST STE A
Ennis, TX 75119
Conditions Commonly Evaluated or Treated
Within Urology 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
- Erectile dysfunction
- Kidney stones
- Overactive bladder
- Prostate cancer
- Urinary incontinence in women
- UTI
Bladder and urethra
- Bladder cancer
- Interstitial cystitis and bladder pain syndrome
- Urethral stricture
Kidney and ureter
- Kidney cancer
Male reproductive and sexual health
- Hydrocele
- Male infertility
- Peyronie's disease
- Testicular and scrotal pain
- Testicular cancer
- Testicular torsion
- Testosterone deficiency
- Varicocele
Prostate
- Elevated PSA
- Enlarged prostate
- Prostatitis
Urinary symptoms and infection
- Blood in the urine
- Kidney infection
- Painful urination
- Recurrent urinary tract infections
- Urinary retention
Bladder & Urination
Kidney health
- Kidney Cyst
Men's health
- Chronic Pelvic Pain in Men
Urinary symptoms
- Waking Up to Pee
Procedures & services
Most searched procedures
- Circumcision
- Cystoscopy
- Kidney stone removal
- Prostatectomy
- Vasectomy
Office diagnosis
- MRI-targeted fusion prostate biopsy
- Prostate biopsy
Bladder procedures
- Artificial Urinary Sphincter Implant
- Bladder Botox Injection
- Bladder instillation therapy
- Radical bladder removal
- Sacral neuromodulation
- Sling surgery for stress incontinence
- Transurethral resection of bladder tumor
Diagnostic imaging
- Prostate Ultrasound
Kidney & ureter procedures
- Ureteral Stent Removal
Kidney and ureter surgery
- Partial kidney removal
- Radical kidney removal
Male reproductive
- Hydrocele repair
- Penile implant surgery
- Surgical correction of penile curvature
- Testicle removal
- Varicocele repair
Prostate
- GreenLight Laser Prostate Surgery
Prostate procedures
- HoLEP Laser Prostate Surgery
- Prostatic urethral lift
- Rezum Water Vapor Therapy
- Transurethral resection of the prostate
Stone procedures
- Ureteral stent placement
Procedures Most Often Billed to Medicare
1,318 services · 964 patients · 14 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ultrasound measurement of bladder capacity after voiding | Procedure | 51798 |
186 | More often than most peers in Urology |
| Diagnostic exam of bladder and urethra using an endoscope | Procedure | 52000 |
68 | As often as other peers in Urology |
| Biopsy of prostate gland | Procedure | 55700 |
27 | As often as other peers in Urology |
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
13 | Less often than most peers in Urology |
| Crushing of stone of ureter with insertion of stent using an endoscope | Procedure | 52356 |
11 | Less often than most peers in Urology |
| Ultrasonic guidance for needle placement | Imaging | 76942 |
27 | More often than most peers in Urology |
| Injection, ceftriaxone sodium, per 250 mg | Drug given | J0696 |
128 | More often than most peers in Urology |
| Automated urinalysis test | Lab test | 81003 |
238 | As often as other peers in Urology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
191 | As often as other peers in Urology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
135 | As often as other peers in Urology |
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 2000 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 Ultrasound measurement of bladder capacity after voiding 8
Providers in TX who bill this service to Medicare most often.
Common questions
What is Dr. Johnston's specialty?
Dr. Johnston is an urologist in Ennis, TX. That is the designation recorded for this NPI in the federal registry, where it is listed as “Urology”.
NPI registry
Where can I find Dr. Johnston?
Dr. Johnston is listed at 206 S Clay St Ste A, Ennis, TX 75119. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Johnston?
The number on file is (903) 229-4292. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Johnston?
Dr. Johnston's National Provider Identifier is 1306897137. 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. Johnston's medical education?
Dr. Johnston attended Other, graduating in 2000. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Johnston have?
Dr. Johnston has 26 years experience. Calculated from a graduation year of 2000, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Johnston known for?
According to Medicare billing data, Dr. Johnston performs procedures including ultrasound measurement of bladder capacity after voiding, diagnostic exam of bladder and urethra using an endoscope and biopsy of prostate gland; reads or performs imaging such as ultrasonic guidance for needle placement, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Johnston's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Johnston. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.