Physician Profile
Unclaimed ProfileAbout ARMSTRONG
John T Armstrong, MD practises obstetrics/gynecology in Napa, CA. John is a 1976 graduate of Texas Tech University Health Science Center School of Medicine. John is also listed as specialising in gynecology.
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
Common questions
What is Dr. Armstrong's specialty?
Dr. Armstrong is an obstetrics/gynecology in Napa, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “OBSTETRICS/GYNECOLOGY”.
NPI registry
Where can I find Dr. Armstrong?
Dr. Armstrong is listed at 3434 VILLA LN SUITE 360, Napa, CA 94558. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Armstrong?
The number on file is (707) 257-4317. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Armstrong?
Dr. Armstrong's National Provider Identifier is 1790875995. 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. Armstrong's medical education?
Dr. Armstrong attended Texas Tech University Health Science Center School of Medicine, graduating in 1976. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Armstrong have?
Dr. Armstrong has 50 years experience. Calculated from a graduation year of 1976, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Armstrong known for?
According to Medicare billing data, Dr. Armstrong performs procedures including exam of external female genitals using an endoscope, exam of cervix and upper part of vagina using an endoscope and irrigation of vagina and/or application of drug to treat infection; reads or performs imaging such as complete ultrasound scan of 1 breast and ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina; provides treatments such as ultrasound of abdomen and pelvis artery and vein blood flow, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Armstrong's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Armstrong. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (707) 257-4317
- Email not available
Practice Locations
3434 VILLA LN SUITE 360
Napa, CA 94558
Procedures Most Often Billed to Medicare
1,804 services · 1,328 patients · 17 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Exam of external female genitals using an endoscope | Procedure | 56820 |
183 |
| Exam of cervix and upper part of vagina using an endoscope | Procedure | 57452 |
109 |
| Irrigation of vagina and/or application of drug to treat infection | Procedure | 57150 |
43 |
| Fitting and insertion of vaginal support device | Procedure | 57160 |
39 |
| Complete ultrasound scan of 1 breast | Imaging | 76641 |
180 |
| Ultrasound scan of uterus, ovaries, tubes, cervix and pelvic area through vagina | Imaging | 76830 |
175 |
| Ultrasound of abdomen and pelvis artery and vein blood flow | Treatment | 93976 |
14 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
413 |
| Annual depression screening, 5 to 15 minutes | Billing code | G0444 |
135 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
129 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated 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 obstetrics/gynecology specialists in Napa 8
Same specialty, same city.
Trained at Texas Tech University Health Science Center School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 11 related providers in 2 groups
Class of 1976 at Texas Tech University Health Science Center School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Exam of external female genitals using an endoscope 3
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.