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Edit this profileAt a glance
- 41880 Kalmia St Ste 100, Murrieta, CA 92562
About Peter O'brien
Peter G. O'Brien, FNP is a nurse practitioner — family based in Murrieta, CA. According to Medicare claims data, Peter cared for 181 Medicare patients across 191 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more, and automated urinalysis test. The provider's National Provider Identifier (NPI) is 1639533490.
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
- (951) 397-4226
- Email not available
Practice Locations
41880 KALMIA ST STE 100
Murrieta, CA 92562
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Family 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
Allergies
Allergy & skin
Blood disorders
Bone & joint
Dermatology
Digestive
Digestive health
Eye conditions
Heart health
Hormones & endocrine
Infections
Men's health
Mental health
Metabolic & weight
Nerve & joint
Nerve & spine
Neurological
Pain
Pain & spine
Pediatric infections
Respiratory
Skin
Sleep
Urinary health
Women's health
Procedures & services
Chronic condition care
Dermatology
Diagnostic screening
Evaluation & Testing
Hormones & endocrine
Injury care
Lab tests
- COVID-19 testing
- Cholesterol screening
- Hemoglobin A1c Test
- Rapid strep testing
- Thyroid Blood Test
- Urine Drug Screen
Mental health
Minor procedures
- Burn and Wound Care
- Superficial foreign-body removal
- Incision and drainage of an abscess
- Ingrown toenail removal
Minor surgery
Physical exams
Prescriptions
Preventative care
Preventative exams
Sexual health
Skin procedures
Sleep
Urgent care
Weight management
Women's health
- IUD insertion and removal
- Pregnancy Confirmation Test
- Birth control counseling
- Contraceptive implant insertion and removal
- Pap smear
- Well-woman exam
Most searched procedures
Allergies
Diagnostic tests
Ear, nose & throat
- Earwax removal
Heart health
Injections
Lifestyle counseling
Neurological care
Occupational health
Pain management
Respiratory care
Screenings
Procedures Most Often Billed to Medicare
191 services · 181 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
117 | More often than most peers in Nurse Practitioner, Family |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
52 | More often than most peers in Nurse Practitioner, Family |
| Automated urinalysis test | Lab test | 81003 |
22 | As often as other peers in Nurse Practitioner, Family |
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 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 Murrieta 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2016 at Other 7
Providers who graduated from the same medical school in the same year.
Common questions
What does Peter G. O'Brien specialize in?
Peter G. O'Brien is a nurse practitioner in Murrieta, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Family”.
NPI registry
Where is Peter G. O'Brien located?
Peter G. O'Brien is listed at 41880 Kalmia St Ste 100, Murrieta, CA 92562. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Peter G. O'Brien's phone number?
The number on file is (951) 397-4226. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Peter G. O'Brien's NPI number?
Peter G. O'Brien's National Provider Identifier is 1639533490. 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 Peter G. O'Brien train?
Peter G. O'Brien attended Other, graduating in 2016. This comes from the CMS National Downloadable File.
CMS public data
How long has Peter G. O'Brien been practicing?
Peter G. O'Brien has 10 years experience. Calculated from a graduation year of 2016, reported in the CMS National Downloadable File.
CMS public data
What does Peter G. O'Brien do most often?
According to Medicare billing data, Peter G. O'Brien 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 Peter G. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Peter G. O'Brien. If this is you, claiming it is free.
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