Tammy C. Chen, NP
- Medicare services, 2024
- 141
- Medicare patients, 2024
- 44
- Part D claims, 2024
- 1,735
- Hospital affiliations
- 1
- Industry payments
- $109
- Practice address
- 510 Superior Ave, Newport Beach, CA 92663
- Practice phone
- Call (949) 764-5700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hoag Clinic - Newport Beach
Urgent Care Center · Newport Beach, California
Find Tammy Chen's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Tammy C. Chen is an adult health nurse practitioner in Newport Beach, California
Tammy Chen practices at Hoag Clinic - Newport Beach in Newport Beach, California.
Tammy Chen's NPI, 1255792875, was assigned on March 9, 2016. Tammy Chen holds California license NP95003688.
- NPI
- 1255792875NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8224320643
- NPI enumeration date
- March 9, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (949) 764-5700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Tammy C. Chen practices at Hoag Clinic - Newport Beach in Newport Beach, California
Tammy Chen's primary practice is Hoag Clinic - Newport Beach, at 510 Superior Ave, Newport Beach, CA 92663. The practice phone is (949) 764-5700.
- Hoag Clinic - Newport Beach510 Superior Ave, Newport Beach, CA 92663Phone(949) 764-5700
Source: Dmand AI Affiliation Data
Tammy C. Chen is affiliated with 3 sites of care and 2 medical groups
Tammy Chen's primary practice is Hoag Clinic - Newport Beach in Newport Beach, California. Tammy Chen is also affiliated with Hoag Hospital Newport Beach. The medical group on file is Hoag Clinic. Dmand AI also links Tammy Chen to 1 more group practice or clinic and 1 medical group, each named with a free account. Tammy Chen's employer is on file too: an urgent care center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Tammy C. Chen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Tammy Chen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hoag Clinic - Newport Beach | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Tammy C. Chen is one of 1,032 adult health nurse practitioners in California
Adult health is Tammy Chen's primary specialty in the NPI Registry, under taxonomy code 363LA2200X. Tammy Chen is licensed in California.
Specialties and state licenses
- Adult health nurse practitioner, CaliforniaPrimary
Adult health nurse practitioners near Tammy Chen
Counts of adult health nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Tammy C. Chen billed Medicare for 141 services in 2024
CMS data shows 141 Medicare services from Tammy Chen across 3 procedure codes in 2024, for 44 Medicare patients. Medicare paid $10,059 for them. Every service was in an office.
Tammy Chen compared with the California median for adult health nurse practitioners, 2024
- Tammy Chen
- California median
- Medicare services
- 141vs 31055% below
- Medicare patients
- 44vs 9453% below
- Part D claims
- 1,656vs 6752.5 times
Medians across 435 adult health nurse practitioners in California with Dmand AI profiles that report each measure.
Tammy Chen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Tammy Chen and other adult health nurse practitioners in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Tammy C. Chen treated 44 Medicare patients in 2024, average age 71
CMS counts 44 Medicare patients who saw Tammy Chen in 2024. The largest group is 65 to 74, with 26 patients. 73% of them have high cholesterol, and 66% have arthritis. 32% are also on Medicaid. Their average risk score is 1.27, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Tammy Chen's median patient age at 73, with 58% women.
Tammy Chen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Tammy Chen's Medicare patients by sex, 2024
- Women2352%
- Men2148%
Chronic conditions among Tammy Chen's Medicare patients, 2024
- High cholesterol73%
- Arthritis66%
- High blood pressure64%
- Alcohol and drug use disorders43%
- Diabetes27%
- Mood disorders25%
Share of Medicare patients with each condition. A patient can have several.
Tammy Chen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Tammy C. Chen wrote 1,735 Medicare Part D claims in 2024
In 2024, Tammy Chen wrote 1,735 Medicare Part D claims for 207 patients. 98% of them were for generic drugs. CMS names the drug for 1,656 of them, across 16 drugs with 11 or more claims each, at $27,138 in total drug cost.
Tammy Chen's Part D claims by kind of drug, 2024
- Generic1,698 claims98%
- Brand-name37 claims2%
Tammy Chen's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Tammy Chen's Part D claims, 2024
- Opioids43%743 of 1,735 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Tammy C. Chen offers telehealth to Medicare patients
Tammy Chen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Tammy Chen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Tammy C. Chen received $109 in industry payments from 2024 to 2025
CMS Open Payments shows 4 general payments to Tammy Chen from 3 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $62.
General payments to Tammy Chen by program year, 2024 to 2025
Companies that paid Tammy Chen the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Tammy C. Chen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Tammy C. Chen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Tammy C. Chen's NPI number?
Tammy C. Chen's NPI number is 1255792875. It was assigned on March 9, 2016, and it is active in the NPI Registry.
What does Tammy C. Chen specialize in?
Tammy C. Chen is an adult health nurse practitioner in Newport Beach, California. The primary specialty in the NPI Registry is Adult Health Nurse Practitioner (taxonomy code 363LA2200X).
Where does Tammy C. Chen practice?
Tammy Chen practices at 510 Superior Ave, Newport Beach, CA 92663. Tammy Chen's primary practice is Hoag Clinic - Newport Beach in Newport Beach, California. Dmand AI also links Tammy Chen to 1 group practice or clinic and 1 medical group.
What is Tammy C. Chen's office phone number?
The practice phone on file for Tammy Chen is (949) 764-5700.
What is Tammy C. Chen's medical license number?
Tammy Chen holds California license NP95003688.
Which hospitals is Tammy C. Chen affiliated with?
Tammy Chen is affiliated with Hoag Hospital Newport Beach.
What medical group is Tammy C. Chen part of?
Tammy Chen is linked to Hoag Clinic. Dmand AI links Tammy Chen to 1 more medical group.
Does Tammy C. Chen accept Medicare?
Yes. CMS data shows Tammy Chen billed Medicare for 141 services in 2024, and Tammy Chen accepts Medicare assignment.
Does Tammy C. Chen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Tammy Chen as offering telehealth services.
How many Medicare patients does Tammy C. Chen see?
CMS counts 44 Medicare patients who saw Tammy Chen in 2024, with an average age of 71.
Show 4 more questionsShow fewer questions
What services does Tammy C. Chen bill to Medicare?
In 2024, Tammy Chen's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and care management and other visits (99442).
What drugs does Tammy C. Chen prescribe most?
In 2024 Medicare Part D data, Tammy Chen's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Gabapentin and Tizanidine HCl.
Has Tammy C. Chen received payments from drug or device companies?
CMS Open Payments shows $109 in general payments to Tammy Chen from 3 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Tammy C. Chen been practicing?
Tammy Chen graduated from medical school in 2015, 11 years ago.
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