Dr. Tammy Wan, MD
- Medicare services, 2024
- 73
- Medicare patients, 2024
- 34
- Part D claims, 2024
- 1,638
- Hospital affiliations
- 1
- Industry payments
- $247
- Practice address
- 1221 West Pacific Coast Highway, Harbor City, CA 90710
- Practice phone
- Call (310) 539-1221
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fresenius Kidney Care South Bay
Dialysis Center - Independent · Harbor City, California
Find Dr. Wan'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.
Dr. Tammy Wan is an internist in Harbor City, California
Dr. Wan practices at Fresenius Kidney Care South Bay in Harbor City, California.
Dr. Wan's NPI, 1205137981, was assigned on November 10, 2010. Dr. Wan graduated from UC Davis School of Medicine in 2010. Dr. Wan holds California license A119071.
- NPI
- 1205137981NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981843299
- NPI enumeration date
- November 10, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 539-1221
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Tammy Wan practices at Fresenius Kidney Care South Bay in Harbor City, California
Dr. Wan's primary practice is Fresenius Kidney Care South Bay, at 1221 West Pacific Coast Highway, Harbor City, CA 90710 in Los Angeles County. The practice phone is (310) 539-1221.
- Fresenius Kidney Care South Bay1221 West Pacific Coast Highway, Harbor City, CA 90710 · Los Angeles CountyPhone(310) 539-1221
Source: Dmand AI Affiliation Data
Dr. Tammy Wan is affiliated with 4 sites of care and 2 medical groups
Dr. Wan's primary practice is Fresenius Kidney Care South Bay in Harbor City, California. Dr. Wan is also affiliated with Kaiser Permanente South Bay Medical Center. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Wan to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Tammy Wan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wan practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fresenius Kidney Care South Bay | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Tammy Wan is one of 16,751 internists in California
Internal medicine is Dr. Wan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Wan is board certified in nephrology by the American Board of Internal Medicine. Dr. Wan is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists chronic diabetes among the conditions Dr. Wan treats.
Internists near Dr. Wan
Counts of internists 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
Dr. Tammy Wan billed Medicare for 73 services in 2024
CMS data shows 73 Medicare services from Dr. Wan across 2 procedure codes in 2024, for 34 Medicare patients. Medicare paid $7,606 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Wan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 342024: 73115%
Dr. Wan compared with the California median for internists, 2024
- Dr. Wan
- California median
- Medicare services
- 73vs 36180% below
- Medicare patients
- 34vs 15177% below
- Part D claims
- 1,451vs 4213.4 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Wan'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.
Need commercial claims for Dr. Wan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Wan and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Tammy Wan treated 34 Medicare patients in 2024, average age 65
CMS counts 34 Medicare patients who saw Dr. Wan in 2024. The largest group is under 65, with 17 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 56% are also on Medicaid. Their average risk score is 6.01, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Wan's median patient age at 65, with 44% women.
Dr. Wan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Wan's Medicare patients by sex, 2024
- Women1132%
- Men2368%
Chronic conditions among Dr. Wan's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes74%
- Ischemic heart disease59%
- Heart failure53%
- Atrial fibrillation38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Wan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Tammy Wan wrote 1,638 Medicare Part D claims in 2024
In 2024, Dr. Wan wrote 1,638 Medicare Part D claims for 290 patients. 95% of them were for generic drugs. CMS names the drug for 1,451 of them, across 29 drugs with 11 or more claims each, at $97,229 in total drug cost. In 2023, CMS named 1,684 claims across 33 drugs.
Dr. Wan's Part D claims by kind of drug, 2024
- Generic1,554 claims95%
- Brand-name and other84 claims5%
Dr. Wan'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 Dr. Wan's Part D claims, 2024
- Antibiotics1%13 of 1,638 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,6842024: 1,45114%
Drugs named by CMS: 29 in 2024, 33 in 2023.
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
How Dr. Tammy Wan takes part in Medicare
Dr. Wan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Tammy Wan received $247 in industry payments from 2016 to 2019
CMS Open Payments shows 3 general payments to Dr. Wan from 2 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Otsuka America Pharmaceutical, Inc. paid the most, $225.
General payments to Dr. Wan by program year, 2016 to 2019
Companies that paid Dr. Wan the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Tammy Wan has 1 award and honors on record
Dmand AI lists 1 award for Dr. Wan, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Wan
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Tammy Wan graduated from UC Davis School of Medicine
Dr. Wan graduated from UC Davis School of Medicine in 2010.
- Medical school
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Tammy Wan accepts plans from 11 insurance carriers
Dr. Wan is in network with 11 carriers, including United Healthcare, Elevance and Kaiser Permanente. HMO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- United Healthcare
- Elevance
- Kaiser Permanente
- Aetna
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- Blue Cross Blue Shield of Michigan
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Wan accepts, by number of carriers
- HMO6
- PPO6
- EPO3
- Medicare2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Tammy Wan'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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 Dr. Tammy Wan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Tammy Wan's NPI number?
Dr. Tammy Wan's NPI number is 1205137981. It was assigned on November 10, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Tammy Wan?
Dr. Tammy Wan is an internist in Harbor City, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Tammy Wan practice?
Dr. Wan practices at 1221 West Pacific Coast Highway, Harbor City, CA 90710. Dr. Wan's primary practice is Fresenius Kidney Care South Bay in Harbor City, California. Dmand AI also links Dr. Wan to 2 group practices and clinics and 1 medical group.
What is Dr. Tammy Wan's office phone number?
The practice phone on file for Dr. Wan is (310) 539-1221.
What is Dr. Tammy Wan's medical license number?
Dr. Wan holds California license A119071.
Which hospitals is Dr. Tammy Wan affiliated with?
Dr. Wan is affiliated with Kaiser Permanente South Bay Medical Center.
What medical group is Dr. Tammy Wan part of?
Dr. Wan is linked to Southern California Permanente Medical Group. Dmand AI links Dr. Wan to 1 more medical group.
Does Dr. Tammy Wan accept Medicare?
Yes. CMS data shows Dr. Wan billed Medicare for 73 services in 2024, and Dr. Wan accepts Medicare assignment.
How many Medicare patients does Dr. Tammy Wan see?
CMS counts 34 Medicare patients who saw Dr. Wan in 2024, with an average age of 65.
Is Dr. Tammy Wan board certified?
Yes. Dr. Wan is board certified in nephrology by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Tammy Wan bill to Medicare?
In 2024, Dr. Wan's most billed Medicare services were hospital inpatient care (99233) and hospital inpatient care (99223).
Where did Dr. Tammy Wan go to medical school?
Dr. Wan graduated from UC Davis School of Medicine in 2010.
What drugs does Dr. Tammy Wan prescribe most?
In 2024 Medicare Part D data, Dr. Wan's most prescribed drugs by claims were Calcitriol, Amlodipine Besylate and Furosemide.
Has Dr. Tammy Wan received payments from drug or device companies?
CMS Open Payments shows $247 in general payments to Dr. Wan from 2 companies from 2016 to 2019. The largest total came from Otsuka America Pharmaceutical, Inc.
How long has Dr. Tammy Wan been practicing?
Dr. Wan graduated from medical school in 2010, 16 years ago.
What insurance does Dr. Tammy Wan accept?
Dr. Wan is in network with 11 carriers, including United Healthcare, Elevance and Kaiser Permanente. HMO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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