Dr. Patty Peng-Jung Chi, MD
- Medicare services, 2024
- 1,840
- Medicare patients, 2024
- 165
- Part D claims, 2024
- 418
- Industry payments
- $7,442
- Affiliated sites
- 5
- Practice address
- 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040
- Practice phone
- Call (408) 739-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center Mountain View
Surgery Center - Medicare-Certified · Mountain View, California
Find Dr. Chi'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. Patty Peng-Jung Chi is an allergist and immunologist in Mountain View, California
Dr. Chi practices at Surgery Center Mountain View in Mountain View, California.
Dr. Chi's NPI, 1407898323, was assigned on June 12, 2006. Dr. Chi graduated from UCSF School of Medicine in 1999. Dr. Chi holds California license A82242.
- NPI
- 1407898323NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274567268
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (408) 739-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Patty Peng-Jung Chi practices at Surgery Center Mountain View in Mountain View, California
Dr. Chi's primary practice is Surgery Center Mountain View, at 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040. The practice phone is (408) 739-6000.
- Surgery Center Mountain View701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040Phone(408) 739-6000
Source: Dmand AI Affiliation Data
Dr. Patty Peng-Jung Chi is affiliated with 5 sites of care and 4 medical groups
Dr. Chi's primary practice is Surgery Center Mountain View in Mountain View, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Chi to 4 more group practices and clinics and 3 medical groups, 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. Patty Peng-Jung Chi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chi practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center Mountain View | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Patty Peng-Jung Chi is one of 386 allergists and immunologists in California
Allergy and immunology is Dr. Chi's primary specialty in the NPI Registry, under taxonomy code 207K00000X. Dr. Chi is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Chi's licenses on file in 2 states: California and Maryland.
Specialties and state licenses
- Allergy and immunology, CaliforniaPrimary
- Maryland license
Clinical focus
Dmand AI lists acute sinusitis, asthma, chronic nasal allergies and immune deficiency disease among the conditions Dr. Chi treats.
Allergists and immunologists near Dr. Chi
Counts of allergists and immunologists 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. Patty Peng-Jung Chi billed Medicare for 1,840 services in 2024
CMS data shows 1,840 Medicare services from Dr. Chi across 8 procedure codes in 2024, for 165 Medicare patients. Medicare paid $28,262 for them. Every service was in an office.
Dr. Chi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,3452024: 1,71528%
- Office and hospital visits
- 2023: 1472024: 12515%
Dr. Chi compared with the California median for allergists and immunologists, 2024
- Dr. Chi
- California median
- Medicare services
- 1,840vs 1,840Close to median
- Medicare patients
- 165vs 14514% above
- Part D claims
- 318vs 25923% above
Medians across 368 allergists and immunologists in California with Dmand AI profiles that report each measure.
Dr. Chi'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. Chi?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chi and other allergists and immunologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Patty Peng-Jung Chi treated 165 Medicare patients in 2024, average age 73
CMS counts 165 Medicare patients who saw Dr. Chi in 2024. The largest group is 65 to 74, with 95 patients. 65% of them have high cholesterol, and 54% have high blood pressure. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chi's median patient age at 35, with 55% women.
Dr. Chi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chi's Medicare patients by sex, 2024
- Women11670%
- Men4930%
Chronic conditions among Dr. Chi's Medicare patients, 2024
- High cholesterol65%
- High blood pressure54%
- Arthritis43%
- Asthma41%
- Osteoporosis27%
- Diabetes21%
- Anxiety19%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 35
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Patty Peng-Jung Chi wrote 418 Medicare Part D claims in 2024
In 2024, Dr. Chi wrote 418 Medicare Part D claims for 60 patients. 51% of them were for generic drugs. CMS names the drug for 318 of them, across 14 drugs with 11 or more claims each, at $161,758 in total drug cost. In 2023, CMS named 277 claims across 13 drugs.
Dr. Chi's Part D claims by kind of drug, 2024
- Generic212 claims51%
- Brand-name206 claims49%
Dr. Chi'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. Chi's Part D claims, 2024
- Antibiotics6%25 of 418 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: 2772024: 31815%
Drugs named by CMS: 14 in 2024, 13 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
Dr. Patty Peng-Jung Chi offers telehealth to Medicare patients
Dr. Chi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chi as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Patty Peng-Jung Chi received $7,442 in industry payments from 2016 to 2025
CMS Open Payments shows 268 general payments to Dr. Chi from 26 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. AstraZeneca Pharmaceuticals LP paid the most, $1,372.
General payments to Dr. Chi by program year, 2016 to 2025
General payments to Dr. Chi by kind, 2016 to 2025
- Food and beverage$7,23397%
- Education$2083%
Companies that paid Dr. Chi the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Patty Peng-Jung Chi has 1 award and honors on record
Dmand AI lists 1 award for Dr. Chi.
Awards and honors for Dr. Chi
- Undated
- AAAAI Fellow
Source: Dmand AI Professional Profile Data
Dr. Patty Peng-Jung Chi graduated from UCSF School of Medicine
Dr. Chi graduated from UCSF School of Medicine in 1999. Dr. Chi is a member of AAAAI.
- Medical school
- Board certified in allergy & immunology
Source: Dmand AI Professional Profile Data
Dr. Patty Peng-Jung Chi accepts plans from 13 insurance carriers
Dr. Chi is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Chi accepts, by number of carriers
- PPO9
- Medicare8
- HMO6
- EPO4
- POS4
Source: Dmand AI Insurance Network Data
Sources for Dr. Patty Peng-Jung Chi'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. Patty Peng-Jung Chi
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. Patty Peng-Jung Chi's NPI number?
Dr. Patty Peng-Jung Chi's NPI number is 1407898323. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Patty Peng-Jung Chi?
Dr. Patty Peng-Jung Chi is an allergist and immunologist in Mountain View, California. The primary specialty in the NPI Registry is Allergy & Immunology Physician (taxonomy code 207K00000X).
Where does Dr. Patty Peng-Jung Chi practice?
Dr. Chi practices at 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040. Dr. Chi's primary practice is Surgery Center Mountain View in Mountain View, California. Dmand AI also links Dr. Chi to 4 group practices and clinics and 3 medical groups.
What is Dr. Patty Peng-Jung Chi's office phone number?
The practice phone on file for Dr. Chi is (408) 739-6000.
What is Dr. Patty Peng-Jung Chi's medical license number?
Dr. Chi holds California license A82242, one of the licenses on file in 2 states.
Which states has Dr. Patty Peng-Jung Chi been licensed in?
Dmand AI has state licenses on file for Dr. Chi in California (2003 to 2026) and Maryland (2001 to 2004).
What medical group is Dr. Patty Peng-Jung Chi part of?
Dr. Chi is linked to The Permanente Medical Group, Inc. Dmand AI links Dr. Chi to 3 more medical groups.
Does Dr. Patty Peng-Jung Chi accept Medicare?
Yes. CMS data shows Dr. Chi billed Medicare for 1,840 services in 2024, and Dr. Chi accepts Medicare assignment.
Does Dr. Patty Peng-Jung Chi offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chi as offering telehealth services.
How many Medicare patients does Dr. Patty Peng-Jung Chi see?
CMS counts 165 Medicare patients who saw Dr. Chi in 2024, with an average age of 73.
Show 7 more questionsShow fewer questions
Is Dr. Patty Peng-Jung Chi board certified?
Yes. Dr. Chi is board certified in allergy & immunology by the American Board of Allergy and Immunology.
What services does Dr. Patty Peng-Jung Chi bill to Medicare?
In 2024, Dr. Chi's most billed Medicare services were allergy test or treatment (95004), allergy test or treatment (95117) and allergy test or treatment (95165).
Where did Dr. Patty Peng-Jung Chi go to medical school?
Dr. Chi graduated from UCSF School of Medicine in 1999.
What drugs does Dr. Patty Peng-Jung Chi prescribe most?
In 2024 Medicare Part D data, Dr. Chi's most prescribed drugs by claims were Albuterol Sulfate Hfa, Azelastine HCl and Montelukast Sodium.
Has Dr. Patty Peng-Jung Chi received payments from drug or device companies?
CMS Open Payments shows $7,442 in general payments to Dr. Chi from 26 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Patty Peng-Jung Chi been practicing?
Dr. Chi graduated from medical school in 1999, 27 years ago.
What insurance does Dr. Patty Peng-Jung Chi accept?
Dr. Chi is in network with 13 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
Selling to allergy and immunology practices?
See allergists and immunologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card