Provider Profile
Mary Nganga, NP
Unclaimed ProfileAbout Mary Nganga
Mary Nganga, NP is a nurse practitioner based in San Mateo, CA. Mary is also listed as specializing in nurse practitioner — primary care. According to Medicare claims data, Mary cared for 543 Medicare patients across 1,214 services. The services billed most often include complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month, chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month, and telephone medical discussion with physician, 21-30 minutes. The provider's National Provider Identifier (NPI) is 1578920880.
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
- (888) 227-8884
- Email not available
Practice Locations
1875 S GRANT ST STE 760
San Mateo, CA 94402
14141 Southwest Fwy Ste 500
Sugar Land, TX 77478
488 E Santa Clara St
Arcadia, CA 91006
Procedures Most Often Billed to Medicare
1,214 services · 543 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Complex chronic care management services for two or more chronic conditions, each additional 60 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99489 |
344 | More often than most peers in Nurse Practitioner |
| Chronic care management services for two or more chronic conditions, additional 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99439 |
165 | More often than most peers in Nurse Practitioner |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
151 | More than most peers in Nurse Practitioner |
| Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99490 |
147 | More often than most peers in Nurse Practitioner |
| Complex chronic care management services for two or more chronic conditions, first 60 minutes of clinical staff time directed by health care professional, per calendar month | Office visit | 99487 |
114 | As often as other peers in Nurse Practitioner |
| Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99349 |
81 | As often as other peers in Nurse Practitioner |
| Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment | Office visit | 99453 |
71 | Too few peers to compare |
| Residence visit for established patient with high level of medical decision making, per day, if using time, at least 60 minutes | Office visit | 99350 |
38 | Less often than most peers in Nurse Practitioner |
| Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | Office visit | 99457 |
26 | Less often than most peers in Nurse Practitioner |
| Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | Office visit | 99454 |
24 | Less often than most peers in Nurse Practitioner |
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.
Other nurse practitioners at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 23 related providers in 3 groups
Other nurse practitioners in San Mateo 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2015 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Mary Nganga's specialty?
Mary Nganga is a nurse practitioner in San Mateo, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Mary Nganga?
Mary Nganga is listed at 1875 S Grant St Ste 760, San Mateo, CA 94402. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Mary Nganga?
The number on file is (888) 227-8884. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Mary Nganga's NPI number?
Mary Nganga's National Provider Identifier is 1578920880. 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 Mary Nganga's education?
Mary Nganga attended Other, graduating in 2015. This comes from the CMS National Downloadable File.
CMS public data
How long has Mary Nganga been practicing?
Mary Nganga has 11 years experience. Calculated from a graduation year of 2015, reported in the CMS National Downloadable File.
CMS public data
What is Mary Nganga known for?
According to Medicare billing data, Mary Nganga 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 Mary Nganga confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Mary Nganga. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.