Two communities, a city edge and the land between
ZIP code 91390 covers the country north of Santa Clarita. Agua Dulce and Green Valley, two unincorporated communities, sit entirely inside it, along with the northern edge of the City of Santa Clarita. By the Census Bureau's own boundary file, most of its land lies in no named place at all. Agua Dulce has 2,828 people, and 703 of them, 24.9 percent, are 65 or older. The median age there is 56.8, against 38.2 for Los Angeles County. And 968 of its 1,089 occupied homes, 88.9 percent, are owner occupied. The median household income is $146,107. Green Valley has 880 people, 145 of them 65 or older. Its median age is 51.9, and 308 of its 420 homes are owner occupied. Across all of 91390, 2,928 of 19,308 people are 65 or older. The share, 15.2 percent, matches the county's. Of those 2,928, about seven in ten, or 2,080 people, live outside the two communities, on the Santa Clarita edge and in the land between. The ZIP code's median age is 46.7, and its median household income is $151,897. Of its 6,414 occupied homes, 5,556 are owner occupied. That is 86.6 percent, against 45.9 percent countywide. All of these figures come from the 2020 to 2024 American Community Survey. The 65 and older counts are summed from its age brackets, not estimated from a percentage. At home, 78.6 percent of people 5 and older in 91390 speak only English, and 13.8 percent speak Spanish. In Agua Dulce the Spanish share is 22.0 percent. If your parents are more comfortable in Spanish, Lara can do the entire review in Spanish.
Henry Mayo to the south, the Antelope Valley to the east
No hospital sits inside 91390. Measured from the middle of the ZIP code, the nearest by a wide margin is Henry Mayo Newhall Hospital at 23845 McBean Pkwy in Valencia. It is licensed for 334 beds and is the general hospital for the Santa Clarita Valley. Two more are to the east, in the Antelope Valley. Antelope Valley Hospital, at 1600 W Ave J in Lancaster, is licensed for 390 beds. Palmdale Regional Medical Center, at 38600 Medical Center Drive, is licensed for 184. Both run emergency departments. There is no Kaiser hospital in the Santa Clarita Valley or the Antelope Valley. The closest is Kaiser Foundation Hospital Panorama City at 13652 Cantara St, licensed for 218 beds, and only Kaiser plan members have it in network. The bed counts are from California state licensing records, read in September 2026. Those four hospitals belong to separate systems. If you are on a Medicare Advantage plan, its medical group decides which one admits you. Out here, that also decides which way you drive, toward Valencia or out to the Antelope Valley. A single insurer can run its plans through different groups, and the groups rework their hospital contracts year to year. Knowing the insurer does not tell you which way you would be headed. So Lara starts with names: each doctor you see, the pharmacy you use and the hospital you would choose. She looks every one of them up in each plan's current directory before you enroll. Each fall, after plans publish their changes, she looks them up again.
Coverage that reaches both valleys, and what it costs
Out here, a plan's network can decide which valley you are treated in. Original Medicare with a Medicare Supplement takes that choice out of the network's hands. It works with any doctor or hospital that takes Medicare, in either valley or anywhere else in the country. That is why Lara prices a Supplement next to the Medicare Advantage plans for 91390 instead of ruling it out at the start. This far out, home health aides and in home services also take more work to arrange. Before you pick a plan, find out which home health agencies in its network will send someone to your address. Ask now, while nobody in the family needs the help. The median household income is $151,897 across 91390 and $146,107 in Agua Dulce. At that level, the income related surcharge on Part B and Part D premiums can apply. It is based on the income your tax return showed two years earlier. In the first year or two of retirement, that means you can be charged on pay you no longer receive. Form SSA-44 is how you ask for a correction after retirement or another life changing event cuts your income. Nearly nine homes in ten in Agua Dulce are owner occupied. If the house is most of what your family owns, look at long term care coverage years before anyone needs care. It also helps to know what Medi-Cal's rules would mean for the home. Lara can go over the coverage with you on a separate call or visit, not as part of your Medicare review.
Medicare Advantage across Los Angeles County in 2027
About 57 percent of Los Angeles County's 1.7 million Medicare beneficiaries are enrolled in Medicare Advantage or another Medicare health plan (CMS, May 2026). The county has 70 Medicare Advantage plans open to general enrollment in 2027, plus 54 Special Needs Plans, and 60 of the 70 charge a $0 monthly plan premium (CMS 2027 Landscape file). What varies far more is the out of pocket maximum, the most you pay in a year for covered care in network: our analysis of the same file puts the average at $2,232 and the median at $1,500, with a range from $199 to $9,850.
Lara is a licensed insurance agent. Insurance companies pay her when you enroll, so her help costs you nothing and your premium is the same with or without her.
How Lara is paidIndependent Medicare help in Agua Dulce and Green Valley
Goulson Insurance Services Inc. is an independent insurance agency, and our agents work as licensed brokers for Agua Dulce and Green Valley families. No single insurance company employs us or decides what we recommend, so the comparison starts with your doctors, your prescriptions and your budget. We put Medicare Advantage, Medicare Supplement and Part D plans from several carriers side by side, and you enroll only if one fits. The agency holds CA license 6020069, Lara Goulson holds CA license 0E69969, and we work in English, Spanish and Hebrew.
Help that keeps going after you enroll
Your enrollment is not the last you will hear from Lara. If a claim is denied, she calls the plan with you on the line. She also chases down billing mistakes and calls doctors' offices with you. From Agua Dulce or Green Valley, all of it can be handled by phone. Long term care, life insurance and final expense policies each get their own call or visit with her, kept apart from your Medicare plan review.
Lara comes out to Agua Dulce and Green Valley. Call or text (818) 472-5484.
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