DR. PATTY PENG-JUNG CHI (MD) – Allergy & Immunology Physician, NPI 1407898323
Allergy & Immunology Physician
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Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for DR. PATTY PENG-JUNG CHI (MD)
325 DISTEL CIR
LOS ALTOS, CA 940221408
Phone:
Fax: (650) 324-9447
Type: Mailing
3400;3428;3448, Mowry Avenue, Centerville District, Fremont, Alameda County, California, 94536, United States
FREMONT, CA 945381422
Phone: (510) 373-3000
Fax: (510) 744-9959
Type: Mailing
Florian Orthodontics, 101, South San Mateo Drive, San Mateo, San Mateo County, California, 94401, United States
STE 311
SAN MATEO, CA 94401
Phone: (650) 696-8315
Fax: (650) 696-8229
Type: Location
1300 CRANE ST
MENLO PARK, CA 940254260
Phone: (650) 498-6500
Fax: (650) 324-9447
Type: Mailing
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 940402833
Phone: (650) 934-7888
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 11 Open Payments records for all available years, with a total value of $439.
Total Amount is formed as General ($439) + Research ($0) + Ownership ($0) = $439.
Last reported payment date: 2024-10-03 • Largest payer in this snapshot: PFIZER INC. ($189).
Total Amount
$439
General + Research + Ownership
Payments
11
Total payment records
General Amount
$439
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| PFIZER INC. | $189 |
| AstraZeneca Pharmaceuticals LP | $125 |
| Incyte Corporation | $125 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2005-09-20
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20050920000299 | I | Allergy/Immunology | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 95004 | Test for allergy using allergenic extract | 882 | 21 | $0 |
| 95117 | Professional service for multiple injections of allergen | 368 | 77 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 90 | 57 | $0 |
| 95115 | Professional service for single injection of allergen | 82 | 19 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 29 | 29 | $0 |
Insurance plans in this area (ZIP 94022)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| D E R M A T O L O G Y | CA | |
| A L L E R G Y/ I M M U N O L O G Y | CA | |
| - | CA | |
| Hospitalist, Obstetrics/Gynecology | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | OR | |
| - | CA | |
| - | CA | |
| - | CA | |
| - | CA | |
| A N E S T H E S I O L O G Y | CA |
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